11mm Blue Snap Cap with PTFE/Red Rubber Septum, 100-pk (SKU: 4011-51B)

These 11mm blue snap caps feature a PTFE-faced red rubber septum, providing reliable sealing for autosampler vials in chromatography applications. The PTFE lining offers excellent chemical resistance and prevents sample contamination, while the red rubber backing ensures a secure, resealable closure. Ideal for GC and HPLC analysis where sample integrity is critical.

• Cap size: 11mm diameter with snap-on closure design
• Septum material: PTFE (polytetrafluoroethylene) face with red rubber backing
• Color: Blue cap for easy identification and sample organization
• Compatible with standard 11mm crimp-top and snap-top autosampler vials
• Chemical-resistant PTFE layer prevents interaction with samples
• Quantity: 100 caps per package