The RumbleRoller X-Firm Beastie® and Base expands your self-massage experience with a more intense and versatile massage option. This extremely firm massage ball targets smaller and hard-to-reach muscle areas, such as forearms and calves, with high-profile bumps that deliver a deep-tissue massage. The detachable multi-function base secures the X-Firm Beastie®, provides elevation and exposes one of the bumps for maximum muscle penetration. FEATURES: Very aggressive, extremely firm massage ball for deeper and more specific muscle massage Includes X-Firm Beastie®, detachable multi-function base and User Guide Beastie® made of firm, high-profile bumps to work smaller muscles (forearms and calves) Features optimal bump spacing for increased penetration and effectiveness Durable, long-lasting quality withstands heavy use and does not absorb moisture Detachable base secures Beastie® and provides ½” elevation for access to hard-to-reach areas Exposes one of its bumps in a straight-up position for maximum muscle penetration Free-standing support prevents movement during use for more controlled massage techniques Compatible with Beastie Hook™ (sold separately) Measures 3” diameter for easy storage and portability Latex-free and phthalate-free Manufacturer's warranty: 90 days Model: BXA For additional information relating to the Manufacturer's Warranty, please contact 1-800-883-3843.