Features: Expansion structure for steerer tube installation, no hammer required. Constructed from alloy and steel for strength and durability. Prevents scratches or damage to the inner side of the fork tube during installation. Suitable for use with steel, aluminum, titanium, and carbon fiber forks. Reusable design allows for removal and multiple uses. Specifications: Material: Metal. Length: Approximately 3.7 cm / 1.45 in (Small), 6.1 cm / 2.4 in (Middle), 9 cm / 3.54 in (Large). Note: Please allow 1 mm error due to manual measurement. Due to differences in monitor displays, the picture may not reflect the actual item color. Package includes: 1 x Bicycle Compression Plug