Shimadzu Scientific US Webstore - Vial Caps & Septa 13 Vial Caps & Septa 13-425 Blk Poly Red/PTFE/ Sil Septa 0.065" 1000Pack E-mail this product to a friend 4.0 mL WISP 48 Caps and Septa Choose preslit caps (available for some vials) to reduce the risk of needle bending, release vacuum from high-volume injections, and improve injection reproducibility when greater than 20% of vial volume is