Wise 8WD2003 King Pin Power Rise Pedestal, 16 to 22.5-Inch Adjustable Height To Be Used As A Seat Or Leaning Post Rotates 360 Degrees, Adjusts From 16 in. to 22.5 in. Integrated Seat Mount and Height Adjustment Lever Use with King Pin Type Pedestal Base Adjustable from 16 in. to 22.5 in.