20mm Magnetic Crimp Cap, Red Bi-Metal, PTFE/Butyl Rubber Septa, Pharmafix – 100-pk

This 20mm magnetic crimp cap features a red bi-metal construction designed for reliable sealing of headspace vials in GC and GC-MS applications. The Pharmafix design incorporates a PTFE/butyl rubber septum with a thickness of .120" (3mm), providing excellent chemical resistance and low gas permeability—ideal for volatile compound analysis, pharmaceutical quality control, and environmental testing laboratories requiring consistent sample integrity.

• Cap Size: 20mm magnetic crimp cap compatible with standard headspace vials
• Septum Material: PTFE-faced butyl rubber for superior chemical inertness and resealing capability
• Septum Thickness: .120" (3mm) for reliable puncture resistance and multiple injections
• Cap Construction: Red bi-metal design for easy visual identification and secure crimping
• Pharmafix Design: Ensures proper septum positioning and consistent sealing performance
• Package Quantity: 100 caps per pack | P/N: 4570-438