These valves are specifically designed for use in IBC (Intermediate Bulk Container) and tank applications. Valves are made of polypropylene featuring PTFE valve seats, FKM stem o-rings and zinc alloy collars. The Maximum operating pressure 20 psi @ 70?F. Convenient handles close in either direction. Collars fit Schutz® Alignment. Collar ID is 2-3/4".