This ReliaBilt 20-IN toilet supply line has a 3/8-IN compression connector at one end to connect to the water supply valve and a 7/8-IN Ballcock connector at the other end to connect to the toilet. The strong inner PVC hose is wrapped in braided stainless steel to create a durable, corrosion resistant design that prevents kinking and crimping. The supply line can be used for hot or cold water in accessible locations and complies with 0.25% weighted average lead content on wetted surfaces requirement making it suitable for potable water.