Caps, Screw Top, with Silicone Rubber / PTFE Partial Pre-Slit (Y Shape) Septa, fitted in "knurled" polypropylene, Blue Caps. For use with 9-425 thread, 12x32mm autosampler vials. Excellent for GC and GCMS. MicroSolv Brand. 100/PK.
Partial slit, only in the rubber leaves PTFE to form a vapor barrier making this a good choice for volatile samples when an autosampler requires a pre-slit Septa.
The silicone rubber portion of the septa is 45 Shore and 1 mm (0.040 inch) thick. The Y shaped partial slit allows for better "resealing" of the rubber after initial injection.
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