Caps, Screw Top, with Natural Silicone Rubber / White PTFE Pre-Slit Septa, bonded in "knurled", polypropylene, Blue Caps. For use with 9-425mm thread, 12x32mm autosampler vials. MICROSOLV Brand. 100/PK.
Additional Info:
Natural Silicone Rubber has no color added to it and will not have extractable pigments.