DJC Suspension Seatpost Shock Absorber Damping Alu for MTB Bicycle Seat Post 25.4 27.2 28.6 30.1 30.4 30.9 31.6 33.9 X350MM - Walmart.com
DJC Suspension Seatpost Straight Pillar Headless Bike Seat Post Shock Absorber for City Bike MTB 25.4 27.2 28.6 30.4 30.9 31.6mm measure diameter before buy 28.6mm*350mm
Amazon.com : UPANBIKE Bike Suspension Seatpost 400mm Length φ27.2mm 28.6mm 30.9mm 31.6mm Shock Absorber Seat Post for Mountain Bike Seat Post BMX Road Bike(27.2mm*Black+Red : Sports & Outdoors