Silica Gel Stopper for Test Tube
Stopper Dia.mm Capacity(ml)
7-11 9×75 8-12 10×75 9-13 12×100 12-14 13×100 13-15 14×150 14-16 15×150 14-17 16×150 17-19 18×180 16-23 19×180 18-23 20×200 22-26 25×250 24-28 26×250 26-29 30×300 27-31 32×300