This 23/64" (9 mm) continuous thread bullet tube closure has a smooth top and sidewall. It's made from polypropylene and has a standard V thread profile and M4 neck thread. It's compatible with 5/8" thru 1 3/16" diameter extruded tubes. Berry Global offers a broad range of tube closures designed to complement our extensive portfolio of laminate and extruded tubes and to meet the needs of any application. All of our tubes packaging solutions are 100% assembled domestically at vertically integrated plants in Evansville, IN, and Easthampton, MA.