Caps, Screw Top, with Silicone Rubber / PTFE, ultra-pure, Pre-Slit Septa, fitted in "knurled", polypropylene, Light Blue Caps. For use with 9-425mm thread, 12x32mm autosampler vials, 1000/CS.

Highest purity Septa on the market, with no color added to the Rubber or Teflon for improved purity. Good choice for LCMS & LCMS/MS.

Pre-slit for easy penetration by autosampler needles and recommended for Waters® Alliance, Acquity™ and all other autosamplers that require Pre-Slit Septa. For lower cost, non-slit version please click HERE for more information.

Click HERE for smaller pack quantities.