Caps, Screw Top, with White Silicone Rubber / White PTFE, ultra-low bleed, Pre-Slit Septa, bonded in "knurled", polypropylene, Dark Blue Caps. For use with 9-425mm thread, 12x32mm autosampler vials. AQ Brand. 100/PK
Pre-slit for easy penetration by autosampler needles and recommended for Waters® Alliance, Acquity™ and all other autosamplers that require Pre-Slit Septa.
Good choice for LCMS & LCMS/MS.