MECCANIXITY Straight Copper Coupling Fittings, 1/4 Inch ID Welding Joint for HVAC Air Conditioner, with Rolled Tube Stop Sweat Ends, Pack of 5 - Amazon.com
NIBCO 3/4 In. x 3/4 In. Press Copper Coupling without Stop - Roush Hardware
Amazon.com: Supply Giant DDSD0121-5 Reducing Copper Coupling Fittings With Sweat Ends And Rolled Tube, 1/2 X 1/4 Inch : Industrial & Scientific
NIBCO 1/2 In. x 1/4 In. Reducing Copper Coupling with Stop - Power Townsend Company