PYREX� Spare Glass Stopcock Key, 1.5mm bore

PYREX� Spare Glass Stopcock Key, 1.5mm bore
Manufactured from 3.3 expansion borosilicate glass complying with ISO 3585 (ASTM E-438 Type 1 Class A)
Keys are supplied complete with silicone 'O' ring and PP retaining device
Keys are fully interchangeable