GPA-B28-(XX)GL Pyrex Adapter / #28 Ball & Seal Ring With Cap

The GPA-B28-(XX)GL Pyrex Adapter has a #28 ground glass ball. The adapter comes standard with a Teflon coated Viton O-ring, a silicone O-ring and a #22 screw joint cap. The cap is fitted with a seal ring to accommodate different tubing sizes. The seal ring is a silicone washer with a Teflon face.