GEWAGE Suspension Seatpost for Bicycles - 27.2/30.9/31.6 X 400mm Shock Absorbing Bike Seatposts - Lightweight Aluminum Alloy Seat Post for MTB Road Bike BMX eBike - Walmart.com
Sunlite Adjustable Suspension Seatpost, 27.2mm x 350mm, Silver - Modern Bike
Redshift Shockstop parallel Suspension Seatpost 27.2mm x 350mm