Reelax Live Bait Tuna Tube Gunnel Mount is designed to be fitted flush and hidden into gunnell topside decks or transom top side decks. Tube is custom made to any length and is 150mm ouside diameter. Live Bait Tuna Tube gunnell 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