The Springfield Marine Spring-Lock Hi-Rise Non-Locking Swivel Seat Mount ensures your seat stays firmly in place. Cast-aluminum seat mount has an e-coat finish for durable, long-lasting use. Cast aluminum construction adds 3-1/4 to post height. Use the Springfield Marine Spring-Lock Hi-Rise Non-Locking Swivel Seat Mount with any non-locking Spring-Lock or Clip-Lock Post (sold separately). 7W x 7D. Cancer and Reproductive Harm- www.P65Warnings.ca.gov.