Straight Bore Plain Arms Stopcocks

◎Manufactured from borosilicate glass with PTFE keys for highest resistance to chemical attack.
◎Barrels are highly polished and the keys are self lubricating, avoiding the need for stopcock grease.
◎Keys are fully interchangeable and supplied complete with plastic screw thread retaining device.
◎Made to a taper of 1:10 giving a combination of performance and ease of operation.