... highly polished PP and PS and Glass test Size:12*60, 12*75, 12*100, 13*75, 13*78, 13*100, 15*100, 16 ... *100 Test tube Made of PP or PS or GlassAll the size are available OEM are welcomeTest tubes1, Manufactured from high quality ... polypropylene and Polystyrene2, Diameter from 12 to 16mm,length from 60 to 102mm3, With a ...