The Hookem Live Bait TUNA Tubes are available in a Single Style or a Double Style. They have a 1/2" BSP Female Thread and include a Double Rear Mount Bracket for Easy Fitting.  They are manufactured in Stainless and are Chemically Polished for a High Finish.

On All Styles of Live Bait Tubes the Female Fitting is 1/2" BSP

Also available as an extra option.
Live Bait Kit - Incl - 3mtrs Hosing
                                 1 x Nickel Coated Ball Valve
                                 3 x Plastic Tail Piece
                                 1 x Plastic Tee with 1/2" Fitting