Stainless Steel Supply Line: Stainless steel braided construction for long lasting durability and burst proof Perfect Seal: Metal joint with rubber washers inside for better seal and no water leakage than plastic feeds Toilet Supply Line 7/8 x 3/8: Metric BSP 7/8" (G) female to US 3/8" female braided hose, this piece makes changing an old or leaking feed line very easy Easy to Install: It has a hexagonal section in both and increased bearing surface when adjusting the fitting with a wrench Flexible for Tight Spaces: 22 cm length will reach your application, make sure to measure your distance from toilet to valve