Wheaton® 20mm Crimp Seal Open Top Hole Caps, Aluminum, Unlined, case/1000

WHEATON® 20mm Seal, Open Top Hole Cap, Aluminum, Unlined. The Unlined Aluminum Seal exposes the top of the rubber septum to the syringe. A rubber septa with rubber formulations of gray butyl, natural rubber and silicone can be purchased separately. The aluminum seal can be attached to a serum bottle or vial with a Crimper and easily removed with a Decapper.