Garelick Millennium Series - Seat Slide System - Smooth Series Adds 1/2" (1.25cm) to Pedestal height. Features: Low profile design allows 360 of rotation and 6" of smooth, wobble-free fore and aft travel; Heavy duty anodized aluminum slide plate has standard 5"x12" hole pattern to accommodate standard seat mounting holes; Positive Lock Spider - rotates 360, internal cup engages in 10 increments for positive stop lock (Secondary twist control offers variable drag adj. and can be tightened to lock in place); Internal Delrin cup provides smooth, gaul-free operation.; Available in either left- or right-hand operation; Meets ABYC-H31, Type A Standards & Garelick performance standards; Includes retaining hardware (99302); Powder coated finish; SLIDE : High tensile aluminum profile extrusion 13.75" x 8" (35cm x 20cm) plate, mounting hole pattern 5" x 12" (13cm x 30cm), Fore and Aft travel 6" (15cm); SWIVEL : High tensile aluminum 2 7/8" (7cm) diameter, plastic internal cup. All stainless hardware.; Installation Instructions