Foam padding protects the vitals while learning the arts of using nunchakus. Martial Artist around the world use Nunchaku in both performances, and Ka-Ta. This Nunchaku carries a steel chain and ball bearing Hoshi. It is safe to use and made of polyfoam materials with PVC core support. Overall Length: 30 Inches. Monouchi Length: 12.5 Inches (Shaft). Monouchi Type: Foam Exterior, PVC Interior. Kusari Length: 5 Inches (Chain). Kusari Type: Stainless Steel Chain. Hoshi Type: Stainless Steel, Ball Bearing (Rivet End). Design: Silver Dragon Print, Black Foam.