HOLDRITE® QUICK FLEX™ Connectors are designed to provide fast and easy connections for water heaters and other equipment, such as boilers, water softeners, etc. They are made of large-ID corrugated stainless steel tube, which has higher flow rates than standard copper or braided connectors and isolate against electrolysis. These connectors are more flexible than standard copper flex connectors and are less likely to kink. Available in several sizes from 3/4 to 2 in FIP connectors and from 12 to 24 in lengths. For water use ONLY.