Place of Origin: China MATERIAL :borosilicate 3.3 Joint:14#,24#,19#,29# features:(1)item:Adapter drying tube straight(2)material:heat resistant 3.3 borosilicate glass(3)all types:14# 19# 24# 29#(4)we can provide many laboratory glasswares ,more information please contract us. Adapter drying tube straight