Designed for all Ram Mount systems, these Ram Bases with standard Ball Mount are made from high-strength marine-grade material to ensure long-lasting performance. Each base is outfitted with a 1-dia. rubber ball that firmly holds your GPS and works to minimize shock and vibration from rough roads and choppy waters. Backed by a manufacturers limited lifetime warranty. Cancer and Reproductive Harm- www.P65Warnings.ca.gov. Size: DIAMOND BASE. Type: GPS Mount.