Based on this product's specifications, here are some alternatives and similar models
Compression fitting WAVIN 4064270 for PEXa pipe 25 x 3/4" (25x3/4) with male thread M5
Summary description:
WAVIN 4064270 is a compression connector designed for PEXa (TIGRIS) pipes with a 25 mm outer diameter and 3 mm wall (25 x 3/4"). The fitting features a male thread M5 and is intended for reliable join of PEX piping to threaded components in plumbing and heating systems. Suitable for water supply, underfloor heating manifolds and repair or extension works.