Caps, Snap Top, with Silicone Rubber / PTFE Pre-Slit (X Shape) Septa, fitted in smooth, polyethylene, Yellow Caps. For use with 11mm, 12x32mm Snap Top autosampler vials. MicroSolv Brand. 100/PK.
This is one of the most popular snap caps on the market and has been available for over 25 years. Pre-Slit septa are normally recommended for Waters Alliance instruments.
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.