SHIMANO PRO Discover Di2 Carbon Gravel Seatpost 27.2 x 400mm | eBay
Amazon.com : Kinekt Bike Suspension Seatpost, CR Superlight Carbon Seat Post for Road, Gravel and E-Bikes, Adjusts to Match Weight and Riding Style, Quick and Easy Set-up, LR | 27.2mm | 330mm :