The screw caps with assembled septa are ready-to-use.

• Caps with center hole as well as with closed top
• Bonded screw cap (septa firmly connected with the cap) for blunt HPLC needles is available
• Septa made from economical Red Rubber/FEP and high quality silicone/PTFE
• Plain caps and an assortment of single septa including virgin PTFE septa