Taper-Lock™ 9" Diameter Satin BaseFeatures:High-strength aluminum to withstand all conditionsBelow the deck mount requires a 3-1\/2″ hole in the deck8″ mounting hole patternFlat side bases for limited space applicationsUse with any Taper-Lock™ post (sold separately)Warranty: 5 YearsWARNING: This product can expose you to chemicals which are known to the State of California to cause cancer, birth defects or other reproductive harm. For more information go to P65Warnings.ca.gov.