24' Wheel unicycle with manganese steel frame and aluminum alloy rim for durability Seat with a clamp for quick height adjustment from 36' to 40' Leakproof butyl inner tire once inflated, can be used for 100 days; rubber outer tire with skid proof pattern to ensure riding safety Suitable for office workers, students, riding amateurs to use for fitness exercise, balance training, etc A complete set of tools include quick release seat post clamp, wrench and screws for easy installation