Ace Glass 8779-40 4 Dram Vial with Poly Seal Screw Cap

USP Type 1 borosilicate glass vials with Poly-Seal cone lined closures which are molded in a premium grade, natural low density polyethylene to help prevent deforming and stress cracking. Inverted cone liner is designed to provide an excellent seal and exceptional torque retention, even at low application torque. Caps are not attached, but are packed with vials in sturdy hand-out shelf boxes.