. Blank’s Lanky Pivotal Seatpost is a high-quality seatpost with no frills. It does precisely what you want, and need, it to do. Specifically made at 320mm long, this seatpost will suit all riders. Simply follow the old adage of ‘measure twice and cut once’ and you’ll be up and running in no time. Features: Customise to suitDiameter: 25 4mmLength: 320mmWeight: TBABuy Blank Components from Chain Reaction Cycles, the World’s Largest Online Bike Store.