PYREX� Spare PTFE stopcock key, 2.5mm double bore, 14.5mm diameter

PYREX� Spare PTFE stopcock key, 2.5mm double bore, 14.5mm diameter
PTFE stopcock key with silicone 'O' ring and PP retaining device
PTFE keys are fully interchangeable
Keys are self lubricating, avoiding the need for stopcock grease
Keys have a 1:10 taper to accurately fit the relevant glass stopcock barrel