Post 2-3/8″ Plug-InSpringfield’s 1300715 Plug-In Fixed 2-3/8″ Locking Seat Post is designed for use with Trac-Lock Locking Swivel (Springfield 1100031-L1) and 2-3/8″ Plug-In Bases (sold separately). It measures 15″ from the top to the bottom of the post. The post features a high-strength aluminum post with an anodized finish to help prevent rust and corrosion. Features:15″ height measured from the top to bottom of the postHigh-strength aluminum construction with an anodized finishUse with Track Locking Swivel (1100031-L1)Use with 2-3/8″ Plug-in Bases (sold separately)5-year warrantyFit type: Universal FitWARNING: 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.