Screw Closure, 20x400mm, PTFE Lined, 100-pk | SKU: B7815-20

These premium PTFE-lined screw closures are engineered for secure sealing of laboratory vials and sample containers in demanding analytical applications. The chemically inert PTFE liner provides exceptional resistance to aggressive solvents and prevents sample contamination, making these closures ideal for chromatography, sample storage, environmental testing, and pharmaceutical quality control laboratories.

• Dimensions: 20mm diameter x 400mm thread length for secure, leak-proof sealing
• PTFE-lined septum ensures chemical inertness and prevents analyte adsorption
• Compatible with standard 20mm neck vials and containers
• Resistant to a wide range of organic solvents, acids, and bases
• Convenient 100-pack quantity for high-throughput laboratory workflows
• Suitable for GC, HPLC, and general sample storage applications