Fluidmaster's CLICK SEAL Water Supply Connectors are built to make replacing your water supply connector simply and fast. This innovative 2-piece nut uses the same theory as the gas cap on a car, the nut clicks when it's sealed. Just hand tighten and the audible "click" lets you know it���s sealed. Available in both faucet and toilet connectors. Built from highly flexible and durable braided stainless steel, that resists kinks and creases. Lead free, and meeting all code requirements for flexible water supply connectors.