Providing effective compression and crossfriction for targeted relief, the RumbleRoller® Gator helps reduce soreness, release tightness and prevent injury through deep-tissue self-massage. Deep Tissue Self-Massage Designed with 954 specially formed ‘teeth’ to grip your skin for effective cross-frictional massage Firm surface and small diameter produce high compressive forces in the muscle Quality Construction Durable, long-lasting quality withstands heavy use for maximum performance Ideal size for rolling your entire body including smaller areas like feet and neck Additional Details Length: 22’’ Diameter: 4.5’’ Manufacturer’s Warranty: 90 days