Based on this product's specifications, here are some alternatives and similar models
Rubber Rosette DN100 Ricom 830CG — pipe flange gasket DN100
Summary description:
Ricom ROZETA GUMOWA DN100 (model 830CG) is a rubber rosette designed for pipe connections with nominal diameter DN100. It serves as a flexible gasket or sealing element for flanged or sleeve joints, providing vibration damping and leak prevention in plumbing and drainage systems. Suitable for use where a resilient rubber seal for DN100 piping is required.