Feature: Compact size, light weight, flexible and convenient. Easy to use and store. Even bad road conditions can greatly reduce ride bumps and has a strong protective effect on the body's spine. More stable, more safe. Coated in blue rust-resistant finish. Made of high strength Aluminum alloy for maximum durability. Precise design, anti-rust and wear resistance. Specification: Condition: Brand new Material: Aluminum alloy Color: Black Max Length: Approx 55mm/2.2in Max Width: Approx 29mm/1.1in Max Thickness: Approx 20mm/0.8in Minimum Thickness (screw hole): Approx 15mm/0.6in Increase Height: Approx 3cm/1.2in Screw Aperture: Approx 10mm/0.4in Screw Total Length: Approx 55mm/2.2in Optional Type: Without Screws( 1), with screws( 2) Package Weight: Approx 58g(Without Screws), 128g (With Screws) Package List: 2 * Shock Absorbers Heightening Device 1 * pair of screws 1 * pair of nuts Note: 1. Please allow 1-3cm error due to manual measurement. Thanks for your understanding. 2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard.