Model Number | Children Addition |
---|---|
Origin | Mainland China |
Subject | Mathematics |
Mathematics Practice Number Rolling Stamp Addition And Subtraction Primary School Students Practice Questions Within 100 Math
43.24 $
8597 in stock
Digital Teaching Teaching Roller Stamp
Interesting teaching, let children love learning more
Addition, subtraction, multiplication, division, four styles
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PH Meter 0.01 High Precision for Water Quality Tester with 0-14 Measurement Range Suitable Aquarium Swimming Pool
It's not only ideal for household or laboratory use, also suitable for testing pH balance of drinking water, pool, aquarium, food Project, RO system, Spa, or hydroponics.Note: This product does not include battery, battery model: 2X 1.5V LR44 range: 0.00-14.00 pHResolution: 0.01 pHAccuracy: 0.01 pHBatteries: 2X 1.5V LR44 not includedAutomatic temperature compensation: inchWarm tipsIt STEP 1: Turn open pH meter, Clean the electrode in distill waterIt STEP 2: Immerse the electrode in pH 6.86 standard buffer solutionIt STEP 3: Press the CAL button. Wait until the display digital is 6.86pH and steadyIt STEP 4: Clean the electrode [...]
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1set = 80 Strips! Professional 1-14 pH litmus paper ph test strips water cosmetics soil Acidity test Strips with control card
80 Pcs Multipurpose pH Test Strips Universal Full Range Litmus Paper 1-14 Acidic Alkaline Indicator Food Urine Lab Soil Description: brand new and high quality Features: The scale reads from 1 to 14: 1 - 3 indicates a very acidic substance. 4 - 6 indicates an acidic substance. 7 indicates neutral. 8 - 11 indicates alkalinity. 12 - 14 indicates a very high level of alkalinity. Instruction: 1.Simply press the testing strip to the object or liquid you are testing. Half second later, take out the paper and [...]
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PH Meter Digital PH Tester Water Quality Testers Acidity Measure Device Water Pool Aquarium Hydroponics Home Brew 0-14pH
PH Meter Digital PH Tester Water Quality Testers Acidity Measure Device Water Pool Aquarium Hydroponics Home Brew 0-14pH Product Descriptions 100 BRAND NEW! Measuring pH Range: 0.0 - 14.0 pH Resolution: 0.1 pH Accuracy: ±0.1 pH 20°C, ±0.2 pH Temperature Compensation: 0 - 50°C 32-122°F. Calibration: manual,1 point Battery:2xLR441.5V Without battery NOTE:This item come without retail box Package Content 1 x pH meter 1 x screw driver 2 pouches of calibration buffer solution 4.01 & 6.86 1 x instruction manual English Kindly Reminder Be careful with the glass probe since it may be a little fragile when you use. [...]
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1PCS Aquarium Fish Tank Hang On CO2 Monitor Grass Water Quality Cylinder Detector Checker Test Pet Product
Features: This is a very nice tiny Co2 Glass Checker. Made of quality glass. Specially for pressurized CO2 system plant tank. Used to test and monitor the concentrate of the aquarium water plant fish tank. No suction cups required. Simply hang it on the edge of your planted aquarium. Easy maintenance, since it is not under water, it wont grow algae on the glass. Specification: Material: Glass Length: app. 6cm/2.36 Color: Transparent Quantity: 1 Pc Glass checker Note: 1.Please allow 1-3cm error due to manual measurement. pls make sure you do not mind before you bid. 2.Due to [...]
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110-240V Caperplus Aquarium Q2 PH Temperature TDS 3 In 1 Intelligence Monitor Detector WIFI APP PH Digital Monitor Fish Tanks
Product name: Caperplus Aquarium Q1 Q2 PH Temperature TDS 3 in 1 Intelligence Monitor Detector WIFI APP PH Digital Monitor For Fish Tanks ProductFeatures: Vol: 110V-240V 50/60HZ Size: Control box 120 x 74.5 x 28.5mm, PH probe 145mm 12mm diameter Abnormal alarm Remote monitoring Multi account management Multi device simultancous management Custom name Automatic temperature compensation PH/temp dual display Set PH/temp safety range 24 hour uninterrupted continuous monitoring Data automatic cloud storage, not lost Check historical data anytime year/month/week/day Multi point the valve of different calibration fluids Note:The product and mobile phone should in the same WIFI, [...]
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Seawater Hydrometer Saltwater Meter Salinity Meter Tester Sea Specific Gravities Test For Fish Tank Pond Water Saltwater
Features: 1. Insert the hydrometer 15cm below the water until the water overflows the baffle.2. Specific gravities safety range: 1.020-1.023.3. Readable accuracy that reaches a maximum of + - 0.002 gravities units.4. Endurable ABS plastics for durable and sturdy use.Specifications: Product Name: Sea Water Hydrometer / Salt HydrometerMaterial: PlasticsSize: about 19 x 5cm / 7.5 x 2.0inchPacking List: 1 x Salinity TesterNotes: 1. Due to the lighting effects and shooting angles, there is a color difference in the product, please understand.2. Due to manual measurement, there is a tolerance in the product size. Payment methods: · You may make [...]
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6/7 In 1 Premium Fast Test Strips Swimming Pool Aquarium For Total Hardness Total Alkali Ph Nitrate Chlorine Nitrite Carbonate
Test parameters: 6 in 1: nitrate, nitrite, ph, residual chlorine, total hardness, total alkali.7 in 1: nitrate, nitrite, ph, residual chlorine, total hardness, total alkali, carbonate Features 1. Made of PVE and other materials, safe and environmentally friendly, no pollution. Provides accurate and fast results for any water source, including fresh and salt water swimming pools, spas and hot tubs. 2. Get immediate and reliable results with simple and clear instructions. Just dip it in and compare to the big color chart on the bottle. The ideal range is marked on the bottle. Specification Category: litmus paperMaterial: [...]
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Canon WI-FI adapter W-E1 for Phone for Tablet for computer 7D mark II 5DSR 5DS
New Wi-Fi Adapter Accessory For Canon W-E1 EOS 5DS / 5DS R /7D2 mark II Camera in ChineseThe instructions are in ChinesePackage Inclusion:1 x Wi-Fi AdapterItem Brand New and High QualityColor : BlackModel : W-E1Add Wi-Fi to your previously unconnected 7D Mark II, 5DS, or 5DS R with the SD card-shaped W-E1 Wi-Fi Adapter from Canon. Sliding right into your camera's SD card slotThis device brings high-speed 802.11b/g/n Wi-Fi on a 2.4 GHz band with a range of up to 32.8'.This enables users to wirelessly transfer their photos and MP4-format video to a smart device, as well as remotely [...]
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DM 5-in-1 Card Reader CR023 SD/TF Muldti Card Reader With USB Lightning And Micro USB Interface Adapter Memory Card Reader
DM 5-in-1 Card Reader CR023 SD/TF Muldti Card Reader With USB Lightning And Micro USB Interface Adapter Memory Card Reader DM 5 in 1 card reader CR023 SD/TF Muldti card reader with USB lightning and micro usb Zink AlloyWeight:21gGross Weight:31gSupport capacity: Maxumum 512GPackage weight: 0.031 kgProduct SizeL x W x H: 7 x 2.2 x 0.9cmPackage SizeL x W x H: 12 x 10 x 1.4cm Package Contents:1 x DM card readerRemark: Card reader only, not including micro sd [...]
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Medical props model 1.5 Times Life Size Human Ear Anatomy Model OrganMedical Teaching Supplies Professional
100 brand new and high quality Features: Representation of the outer, middle, and inner ear. 1.5 times enlarged. Made of PVC plastic, natural size with base support. Used in schools in educational programs, demonstrations, and student study. Great model for dentist to communicate with patients. Ear Anatomy Model only, other accessories demo in the picture is not included. Specification: Item Name: Ear Anatomy Model Material: PVC Base Size: Height: app.11.2cm/4.41in Color: As pictures shown Quantity: 1 Pc Note: Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the [...]
60.19 $ Add to cart 35 times the human skin and hair structure magnification model Skin layer structure model Human bone anatomy medical model
Description Subject: Medical Science Color: picture color Material: PVC Multiple: 35 times The model consists of epidermis and dermis of the two parts, a total of four parts, by subcutaneous tissue and deep structure are connected, and display the epidermis, dermis hierarchy and subcutaneous tissue and skin appendages hair, sebaceous glands, sweat glands and nerve endings structure, a total of 25 locations of signs. Compact, easy to carry! Package Contents: [...]
73.66 $ Add to cart
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