DescriptionThese are phenothalin test paper, made of premium paper material, durable and easy to carry. It effectively exerts the function of the test paper to test alkaline and acidic substances. A professional phenothalin test paper for student for labs used.Features- Color: As shown. - Material: Paper. - Size: 7.00X4.50X0.50 cm/ 2.75X1.77X0.20 inch. - Pages: 80 Pages/Book. - Manufactured with paper material, sturdy, durable and lightweight, convenience to use. - Our phenothalin paper set is one of the best choices and a good experiment tool for you. - Easy to operate and simple to use. A perfect physics teaching aid set for you. - This set includes enough quantity of test paper to meet your different needs. - Children can also do it by themselves, which can cultivate their interest and improve their grades.