Caps, Screw Top, with Silicone Rubber / PTFE Pre-Slit Septa, fitted in smooth sided, Robo Style, soft polypropylene, Black Caps. For use with 9-425mm thread, 12x32mm autosampler vials. MicroSolv Brand. 100/PK.
Pre-slit for easy penetration by autosampler needles and to prevent "Septa Plunge" into vials. Compares to Thermo / National Scientific DP® Caps.
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