16' Unicycle with manganese steel frame and aluminum alloy rim for durability Adjustable seat with a clamp on the seat post for quick height adjustment, ranging from 28' to 32' Leakproof butyl inner tire once inflated, providing a durable using time up to 100 days; rubber outer tire is skid proof Suitable for students, beginners, riding amateurs to use for fitness exercise, riding practice, balance training etc Tools include quick release seat post clamp, wrench and screws for easy installation