Old school BMX bicycle 310mm La- Back seat post fluted 25.4mm | Sgvbicycles – SGV Bicycles
Vintage Pleated BMX Seat Blue Padded Diamond Saddle & fluted Seat Post Bike | eBay
BSD Blitzed Pivotal Seat Post BMX – The Secret BMX Shop
Mission Carrier Stealth Pivotal (Brown) BMX Bike Seat and 25.4mm Seat Post Kit | eBay
Cult Counter Tripod BMX Seat Post | SkatePro
Amazon.com : Thinvik Bike Seat Post Matte Aluminum Alloy,Length 350mm,Bicycle Seat Post Replacement for BMX MTB Road&Mountain Bike,Fixed Gear Bike Seatpost25.4/27.2/28.6/30.4/30.8/31.6mm-25.4mm : Sports & Outdoors