Types:10/14 25/14 50/19 100/19 250/19 100/24 250/24 1: ... , heavy wall. glass stopcock ,PTFE stopcock3:Capacity(ml):10 , 25 , 50 ,, 100 ,, 250 joint:14/25 ,, 19/28 , 24/30 4 ... made all kinds of produces as your technical requirement. Reaction the tube