Screw Top vials, 12 × 32 mm, limited volume step vial volume 0.25 mL, clear glass vial, step vial, large opening (with glass insert), pkg of 100 ea : 0.25 mL : thread for 10-425: 12 mm × 32 mm × 6 mm : clear glass vial lips on vial glass insert: pkg of 100 ea