With a high-strength composite construction, this cradle is designed to hold your Garmin eTrex for easy accessibility and safe travel. Compatible with the Garmin eTrex Legend C, Legend Cx, Venture Cx, Vista C, Vista Cx, and Vista HCx models. 1" rubber ball, "B" size. Includes a set of two nuts and bolts to connect cradle to any compatible RAM mount. Not compatible with Garmin eTrex (Non-Color) GPS devices.