At 320mm, the Long Johnson post can be adjusted high enough for comfortably riding while seated, as well as low enough to be out of the way when necessary. Stealth Pivotal mounting system accepts an Allen wrench from below, not thru the seat, but can also be used with a traditional Pivotal seat. ###section### Product Specs TYPE: Stealth LENGTH: 320mm DIAMETER: 25.4mm WEIGHT: 194g / 6.8oz Colour: Black, Polished