Spring-Lock(TM) 9" Round Base SatinFeatures: 8" hole pattern, high-strength aluminum Below the deck mount (requires a 4" hole in the deck) Use with any Spring-Lock(TM) or Clip-Lock post (sold separately) Warranty: 5 Years WARNING: 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.