... 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 ... quality polypropylene and Polystyrene2, Diameter from 12 to 16mm,length from 60 to 102mm3, With a series of accessories--tube stoppers,tube racks ... *42*4211/10F0716*102mm conical 10ml240056*42*4211/10 PS test tube with tube stopper