Developed for comfortable pedaling while seated, & being out of the way when standing on the pedals. The Stealth Pivotal system eliminates the Pivotal access patch for a smooth top & clean look. Designed to be used with 320mm Long Johnson Stealth Pivotal post but can be used with any Stealth Pivotal post or traditional Pivotal post (with socket extension). section Product Specs TYPE: Pivotal PADDING: Mid WEIGHT: 9.3oz