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

• Liner is ultrasonically welded to the cap to eliminate the possibility of glue contamination and bond failure common with autoclaving
• Available in convenient lab pack quantities as well as larger case packs
• Low-compression-set silicone ideal for the storage of samples for prolonged period of time over wide temperature ranges
• PTFE or polypropylene on the exposed face of the liner imparts an inert,chemical-resistant surface
• Open top caps provide access with a syringe
• Autoclavable