joint:14#,19#,24#,29# all sizes:200/14,14 200/ ... ,24 600/24,24 etc (1)item:Column,distilling ,filling type,spiral(2)material:heat resistant 3.3 borosilicate glass(3 ... 400/29,29 500/29,29 600/29,29(5)Manufacturer and supply all kinds of lab glassware in china. Main ... interested in our products, please contact us. Column,distilling ,filling type,spiral