GIẤY QUỲ ĐO PH 1~14

Johnson® pH 1~14 Full-RangeUniversal Test Paper

 Book & Roll-type, with Standard Color-Chart with Certificate of Conformity

 14-Step Color Reaction, pH 1~14 

Bình chọn sản phẩm: (5.0 / 1 Bình chọn)