Frost King ELB78H Self-Sealing 3/8-Inch Wall for Tees and Elbows, Elbow fits 3/4" Copper Pipe The product is manufactured in china This products adds a great value This product is manufactured in United States 3/4-Inch Pipe Elbow Elbow Is Made From Pre-slit Tubular Polyethylene Foam Product Is Self-sealing, And Forms A Tight Seal When The Protective Paper Is Removed The Square Ends Ensure A Perfectly Tight Fit Helps To Save Both Energy, And Money