Based on this product's specifications, here are some alternatives and similar models
Measuring tool INSIZE 4801-15 radius gauge set 15.5–25 mm
Summary description:
INSIZE 4801-15 is a radius gauge set designed for measuring concave and convex radii in the 15.5–25 mm range. Intended for workshop and inspection tasks, the set provides precise reference profiles for checking curved surfaces, tool radii and forming operations. It is suitable for metalworking, quality control and maintenance applications where accurate radius verification is required.