Patch Clamp GlassEvaluated for best softening temperature, electrical properties, sealability, leachable components Features Softening point for patch clamp glass is 720C 4" Long OD ID Tolerance: 0. 1 mm Length Tolerance: 1 mm Quantity: 100 per vial Recommended to use with Glass Handling Forceps (77020) Products supplied non sterile Options Schott Glass 8250 with a Dielectic Constant of 4. 9 Order code OD ID PG52151 4 1. 5 1. 0 mm PG52165 4 1. 65 1. 1 mm Soda Lime