Based on this product's specifications, here are some alternatives and similar models
TECE alternative connector for pipes 3/4" x 16mm TECE 77211600
Summary description:
Alternative pipe connector by TECE for 3/4" x 16mm pipes, model 77211600. Designed to join or adapt 3/4-inch fittings to 16 mm pipe systems, providing a compact mechanical connection for plumbing installations. Suitable for use in domestic and commercial water supply lines where conversion between imperial and metric dimensions or reliable coupling is required.