YakAttacks GT175 Geartrac lets you easily add accessories to a vehicle so its customized for your adventures. Heavy-duty surface mount delivers an adjustable, fully configurable platform for mounting accessories. Anodized-aluminum construction stands up to Mother Nature and is 40% lighter than the first generation model. Includes hardware. Sizes: 4, 8, 12. Cancer and Reproductive Harm- www.P65Warnings.ca.gov. Type: Kayak Accessories.