The RAM Mounts RAP-224-LU is a genuine RAM® Twist-Lock™ suction cup base featuring a 3.3-inch (83.82 mm) diameter and a 1-inch (B-size) rubber ball. Constructed from high-strength composite, this durable base provides a strong, reliable hold on glass and other non-porous plastic surfaces, including RAM® adhesive disks. It incorporates a universal AMPS hole pattern, allowing for attachment of various RAM® device holders and cradles. The integrated RAM® rubber ball and socket technology ensures versatile adjustment for optimal viewing angles. Ideal for securing electronic devices in vehicles or other applications.