(1)material:boro 3.3 (2)joints:14# 19# 24# (3)volum:from 5ml to 250ml (1)item:Reaction tube,PTFE stopcock(2)material:heat resistant 3.3 borosilicate glass(3)joints:14# 19# 24#(4)volum:from 5ml to 250ml(5)We have a great variety of flasks, such as one neck, two neck(bevel), three neck(include bevel), and so on. Reaction tube,PTFE stopcock