The type E Camlock Quick Disonnect is a Male Camlock Adapter x Hose Barb. Type E Camlock Quick Disconnects are generally used with a 1/2" Hose. These camlock quick disconnects are compatible with Type C and B couplers. The type E is similar to the A and F but instead of threads, it has a 1/2" hose barb on the back end. This barb can be rather restrictive, however, it works great if you're using smaller tubing. Disconnect is constructed of stainless steel.