Based on this product's specifications, here are some alternatives and similar models
Copper soldered union Comap E112179001 CU 15 x 1/2 with flat gasket connection
Summary description:
Copper soldered union by Comap, model E112179001, designed for 15 mm to 1/2" pipe connection with a flat gasket sealing surface. The CU construction provides corrosion resistance and thermal conductivity; the union is intended for joining copper piping in heating, domestic water and plumbing installations. Suitable for permanent soldered joints where a gasket-sealed union interface is required.