... 200/14*3 300/14*3 300/14,19*2 400/14,19*2 300/14,24*2 400/14, ... 24*2 500/14,24*2 etc (1)item:Column,distilling,vigreux,upper ... baranch tube(2)material:heat resistant 3.3 borosilicate glass(3)joints:14# 19# 24# 29 ... /14*3 300/14*3 300/14,19*2 400/14,19*2 300/14,24*2 400/14, ... our products, please contact us. Column,distilling,vigreux,upper baranch tube