Pipetec Press Fitting including Connector Copper Pipe 16x2 – 15 mm Pfuek 1615, Certified According to German DVGW Press Fitting : Amazon.de: DIY & Tools
Copper Fitting 1/2 Inch (HVAC Outer Dimension) 3/8 Inch (Plumbing Inner Dimension) - Copper Tee & HVAC – 99.9% Pure Copper - 10 Pack - - Amazon.com
The Plumber's Choice 4 in. Straight Copper Coupling Fitting (5-Pack) 0400CCCL-5 - The Home Depot