RAM Mounts Diamond Ball Base with 1” Ball The RAM-B-238U ball base consists of a 1" B size rubber ball connected to a 2.43" x 1.31" diamond plate. The diamond plate features two holes that measure 1.912" from center to center, matching the industry-standard AMPS hole pattern. This diamond ball base is compatible with a wide variety of RAM® device holders and cradles. Made of powder coated marine grade aluminum. Features: Diamond plate features industry-standard AMPS hole pattern and measures 2.43" x 1.31" Compatible with several RAM® device holders and cradles; ball and socket technology allows for near-infinite adjustability Made of powder-coated, marine-grade aluminum for durability and reliability in the most demanding environments Backed by a lifetime warranty Hole Pattern: 2-Hole AMPS: 1.912" Plate Size: 2.43" x 1.31" Ball Size: B Size (1") Weight Capacity: Standard Use: 2 lbs Heavy-Duty Use: 1 lb Materials: Marine-grade aluminumAdditional Information:Weight: 0.05 kg