PT Coupling SA Series Hard Coat Aluminum Reducer Cam and Groove Hose Fitting, SA Spool Adapter, 3" x 4" Adapter Adapter joins two cam and groove couplers to connect hoses Double-ended male cam and groove-style fitting Hard coat aluminum body for corrosion, chemical, and abrasion resistance and light weight For use with sand and salt water applications, hydraulic oil, coolants, and gasoline and petroleum products Complies with Commercial Item Description A-A-59326D for quick disconnect fittings