Caps, Screw Top, with White Silicone Rubber / White PTFE, ultra-low bleed Septa, bonded in "knurled", polypropylene, Dark Blue Caps. For use with 9-425mm thread, 12x32mm autosampler vials. AQ Brand. 100/PK
This very high purity Septa has low extractables and is excellent choice for HPLC. Compares to "Certified" Brands.