Features: <> High-strength alloy and nylon material, built to last long. <> 360 degree rotating. <> Adjustable distance between the headset and ears to improve ventilation. <> Easy to install, fits 19-21mm rails. <> <> Specifications: <> Material: Alloy + Nylon <> Color: Black / Green / Tan (optional) <> Size: 6.5 * 5cm / 2.6 * 2in <> Weight: 130g / 4.6oz <> <> Package List: Y27292T <> 1 * Pair of Headset Rail