Based on this product's specifications, here are some alternatives and similar models
Terminal connector Simet ZGG1x1,5-50n 1‑conductor 50 mm² blue (84285003)
Summary description:
Simet ZGG1x1,5-50n is a single‑conductor terminal connector for 50 mm² conductors, finished in blue. Designed for safe mechanical and electrical joining of one cable or conductor, it provides a compact insulated connection point for installations and repair work in electrical panels, junction boxes and distribution systems.