Based on this product's specifications, here are some alternatives and similar models
Water hose fitting Geberit 21320 — carbon steel connector, 34 mm depth, 138 mm width, 1 pc
Summary description:
Geberit 21320 is a single-piece water hose fitting made of carbon steel. Pack contains 1 connector with a depth of 34 mm and width of 138 mm. Designed for joining or extending water hoses in plumbing systems, it suits repair and installation tasks where a robust metal connector is required.