444 Compact Threaded Deck MountFits gunnels up to 2″ thick. Secures with no exposed hardware using provided nylon nut.Comes with cap to seal the bottomWARNING: This product can expose you to chemicals including Diisononyl Phthalate (DINP) which is known to the State of California to cause cancer. For more information go to P65Warnings.ca.gov.