Taper-Lock Manual Adjust Post - 13" to 16" for 2-3/8" 2-Piece Manual Adjustable Set Includes: 2-3/8" Manual Adjustable Post With Posi-Lock System Trac-Lock Non-Locking Swivel (3100031-1) Use With Any Taper-Lock Base (sold separately) Rated ABYC Class H-31 B (Fishing Only). 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. Springfield Taper-Lock has a adjustable pedestal of 2-3/8 inch post. It adjusts from 13 inch to 16 inch. Product is manufactured for marine seating applications; features key lock / key unlock special feature, plastic construction, round shape, and is supplied as a single-piece Taper-Lock adjustable pedestal manual component.