Press fittings: 5 different materials - Grande press fittings
Carbon Steel/Copper Cladding Tube for Heat Exchanger,B2. Clad Tube for Heat Exchanger
Empire Industries 1/2 in. x 6 in. Copper Coated Carbon Steel Milford Pipe Hanger 131CT05006 - The Home Depot
3/4 in. Female x Sweat Forged Carbon Steel Dielectric Union, Lead Free | Carr Supply
1 Set (2 Pieces) of Comfort Logafix Compression Fitting KLV 15 for Euro Cone 3/4 inch x 15mm Copper Pipe, mild Steel and Carbon Steel Pipe - Amazon.com
Best Price Pipe Carbon Steel Rod/ Copper Bar/Brass Bar - China Copper, Copper Plate | Made-in-China.com