Screw caps are ideal for use with biological media, volatile solvents, corrosive chemicals and sensitive compounds.

• PTFE or PP on the exposed face of the liner imparts an inert, chemical-resistant surface
• Open top caps provide access with a syringe

Ultrasonically welded liner to the cap eliminates the possibility of glue contamination and bond failure on autoclaving. Low-compression-set silicone provides prolonged period of time sample storage over wide temperature ranges.