Our 10kg Cast Iron Set (30mm) set includes 10 kg of total weight as well as a compatible 35cm bar and 2 spring clips provided to keep weights secure. FSI_Main material Rubber (LA) | Steel With a rugged steel frame and a durable rubber coating, you can trust that your weights are built to last. Enjoy a secure setup with the included clips to keep you safe and a bar designed to handle the weight you need.