Rims Tube, CompleteComplete Rims system ready to hook up to your pump. Choose an element of a size and density to suit your project from the 2400w, 3600w or 4800w elements (2400watt supplied if not specified). Each tube comes with 3 4" Triclover connections and is supplied with 2 x 3 4 clamps and 2 x 3 4 triclamp to 1 2Bsp threaded adaptors. There is a 1 2" bsp thread in the cap to accept your temperature probe.