3/8 in. O.D. X 20 in. Annealed brass water closet Supply riser, adds the finishing touch to any installation. Its trim Mable end allows cutting to length for easier installation. The top flat head portion attaches to the toilet Ballcock, using a 7/8 inch nut. (Not included - comes with most Toilets). made from lead free brass and fully finished for exposed installation. Its sleek appearance gives shame to common flexible Supply lines.