Rectorseal 66735 NoKink Flexible Refrigerant Line Connector, 5/8" Eliminates kinking of refrigerant line 3 inch Copper stubs for quick connection Allows for easy flaring 1/4", 3/8", 1/2", 5/8", 3/4 inch and 7/8 inch sizes available in 36 inch lengths 1/4", 3/8", 1/2 inch and 5/8 inch sizes available in 72 inch lengths