Caps, Screw Top, with Soft-Guard, White Silicone Rubber / Red PTFE Pre-Slit (X Shape) Septa, fitted in "knurled", polypropylene, Blue Caps. For use with 9-425mm thread, 12x32mm autosampler vials. Soft-Guard Brand. 100/PK
X Shape Pre-Slit provides a greater target area for needles and are easier to penetrate but do not reseal as well as single slit septa. Recommended for Waters® Alliance & Acquity instruments.
Soft-Guard™ Septa are easier to penetrate by autosampler needles, and re-seals better than other Caps on the market. This provides longer instrument up-time, fewer missed injections and more consistent data. Use for HPLC, GC, LCMS or GCMS. Click HERE for more information about Soft-Guard™ Septa Technology.