Chrome plated brass mixer with compact trim ring. Ceramic valves for a drip free faucet. 1-3/4" Mounting hole. 1/2" NPT female straight connection with 1/2" hose barb fittings included. 3/8" hose connection fits Scandvik hoses. If you are using a shower rail, a chrome/brass bulkhead elbow may be required to route the plumbing behind the bulkhead for a clean installation.