Fluidmaster 3/8-in Compression 12-in Braided Stainless Steel Toilet Supply Line

3/8-in comp X 7/8-in ballcock X 12 in. Toilet connector clicks when water tight seal is achieved. Tough polymer core covered with braided stainless steel. Won't kink or crease, even in the tightest of spaces. Manufacturer part number PRO1T12CS.