Reelax Live Bait Tuna Tube TM is designed to be fitted to a transom or any flat surface. Tube is custom made to any length and is 150mm ouside diameter. Live Bait Tuna Tube transom mount is priced as a single (1 only) tube. Bottom feed inlet is 19mm - 3/4" hosetail o.d and 12mm - 1/2" i.d. (hose size needed 19mm i.d) Top drain / overflow outlet is 38mm - 1 1/2" o.d and 32mm - 1 1/4" i.d (hose size needed 38mm i.d) Reelax Live Bait Tuna tube is fitted with a deflection / aeration plate in the base of the tube. All tube and fittings are mirror polished 316 stainless and electropolished. Double and triple tubes with shut off / restricting manifolds are available on request. Recommended flow rate per tube is 1000 gallons per hour