Fans of RAM Mounts' industry-leading array of electronics mounts and cradles will welcome the ultra-reliable attachment options made possible by the RAM 2.75" Diameter Suction Cup Base with 1" Ball. The unit's 2 3/4" suction base with twist lock delivers a rock-solid, tenacious hold to glass, plastic, acrylic, and similar smooth, non-porous surfaces. Furthermore, its 1" rubber ball is tailor-made to interface with a wide range of RAM cradles and mounting/adjustment arms (sold separately), so users of other RAM products can seamlessly integrate the base into their operations. Ideal for renter pilots, CFIs, and anyone else who frequently flies a variety of aircraft. Also excellent for use in autos. An extremely affordable, high-quality hands-free accessory for hassle-free electronic access you'll never again want to travel without.