Heavy duty B224 suction cup mount with B201 standard length arm, 3 inches from socket-center to center, and a B238 diamond shape mount. 1 inch diameter B size ball . The suction cup is designed to hold on any smooth non-porous surface, but for best result, mount the suction cup on a glass surface. For use with RAM universal ball and socket mount system. Marine grade aluminum with powder coat finish and rubber ball. Lifetime Warranty.