Source One supplies ½” up to 6” sizes of the 316 Stainless Steel camlock couplings. These are the most durable cam and groove couplings on the market, often used in sanitary applications. The ½” and ¾” SS fittings are commonly known as brewing fittings, used by home brewers everywhere. Standard : A-A59326 Production Method : Lost Wax Casting & Lathe Machining Size : From 1/2″, 3/4″, 1″, 1-1/4″, 1-1/2″, 2″, 2-1/2″, 3″, 4″, 5″, 6″ Body Material : Stainless Steel 304 or 316 Cam Arm Material : Stainless Steel 304 or 316 Gaskets Material : NBR, EPDM, Viton, Silicon Thread : NPT, BSP (Female BSPP & male BSPT) Certificate : ISO9001:2008, CE