Description Digitech Air Trap 250Ml (High Flow) NOTE! : if you have a 2 tank setup you MUST order an Extra Nipple, there is only one mounted!. 4mm Tubing Fill 6mm Tubing to Pump 8mm Tubing from Tank Length:  129mm (mounts included), 148.6mm approx measurement when fittings are attached Height:  69.1mm Diameter:  59.8mm