... stopcocks Kimble Bomex Product. BURETTES, Borosilicate glass with 7.0 expansion,class A,class B,glass stopcocks is product of Kimble Bomex ... ., Ltd. The company is focusing on production of Glass Labware. 1 BURETTES Borosilicate glass with 7.0 expansion,class A,class B ... ,glass stopcocks Item No.Article No.Capacity mlAccuracy limits( ...