This tee adaptor is ideal for use when installing an ice maker, dishwasher, under-the-counter water filter or any other appliance that uses 3/8" O.D. It is made from lead-free brass for durability, strength and safety. The swivel screw connection ensures easy installation without the need for drilling or for extra valves. The adaptor features two 3/8" outside diameter female compression ends and a 1/4" outside diameter push-fit end. Use this tee adaptor with copper or plastic tubing.