Sterile Plastic Petri Dishes: 20 Pack of 90mm diameter x 15mm deep Sterile Petri Dishes with Lids | Special Material:Ethylene oxide sterilization, unvented, with lids, easy to use. | Multifunction:Laboratory analysis for medical,biological,scientific research and other activities, suitable for general training. | Package:20 Pcs 90mm x 15mm Petri dishes,20Pcs Plastic Transfer Pipettes (10Pcs 3ml,10Pcs 2ml) | Warranty:We offer 30 days Money Back Guarantee and 12 months warranty, your satisfaction is our top priority.

Paper Size: 45mm x 7mm (L x W), Comes with 3 Pack(240 pH Strips) and 1 Storage Case. | The test strip color changes must be matched with the pH scale color chart within about 15 seconds. Different pH content discoloration range is different, by comparing the color card ratio: the smaller the number, the stronger the acidity, the larger the value, the stronger the alkalinity. | Please do not dip the PH strips in the test liquid. It might lead to incorrectly showing test result. Please drop the test liquid on the PH strips. It will perfectly indicates the real acidic or alkalinity substance. | There is a strong correlation between the pH of the body's internal environment and pH paper help you to maintain good healthy body by testing many usual substances, including moisturized soap, lemon juice, milk, liquid detergent, moisturized soil, saliva, urine, sweat, etc

Paper Size: 45mm x 7mm (L x W), Comes with 6 Pack(480 pH Strips) and 2 Storage Case. | The test strip color changes must be matched with the pH scale color chart within about 15 seconds. Different pH content discoloration range is different, by comparing the color card ratio: the smaller the number, the stronger the acidity, the larger the value, the stronger the alkalinity. | Please do not dip the PH strips in the test liquid. It might lead to incorrectly showing test result. Please drop the test liquid on the PH strips. It will perfectly indicates the real acidic or alkalinity substance. | There is a strong correlation between the pH of the body's internal environment and pH paper help you to maintain good healthy body by testing many usual substances, including moisturized soap, lemon juice, milk, liquid detergent, moisturized soil, saliva, urine, sweat, etc

Package: 60 Pcs 90mm x 15mm Petri dishes | Pecial Material: Ethylene oxide sterilization, vented with lids, easy to use. | Multifunction: Laboratory analysis for medical,biological,scientific research and other activities, suitable for general training. | Warranty: We offer 30 days Money Back Guarantee and 12 months warranty, your satisfaction is our top priority.