Norco Coupler has a 3/8" inner diameter and a 3/8 NPT male end, for connection to a pump. This quick-connect, high-flow coupler, made in the USA, allows the joining of a pump to a ram by connecting a hose to the pump. The coupler also allows for fast set-up of hydraulic systems and includes a two-in-one dust cap for use on male and female coupler halves. Also, local sales taxes will be applied to ALL Norco orders shipped to California.