Total BMX Tech Gyro – Black Smooth spins, lightweight, and built to last – the Total BMX Tech Gyro keeps your bars turning clean and precise. CNC machined from 6061-T6 aluminum with a nylon bushing for effortless rotation. Specifications: Material: CNC 6061-T6 aluminum Inner Diameter: 47 mm Height: 19 mm Bearing: Nylon bushing Weight: approx. 32 g / 1.1 oz Compatibility: 1-1/8" integrated headsets