focus revision metal tactical airsoft paintball night vision ach pasgt helmet nvg mount base lightweight outdoor hunting helmet rail mount helmet accessory (black) focus revision <p><b>specifications:</b></p><p>material: metal</p><p>weight: 50g</p><p>install area size: </p><p>1.62"/ 41.3mm (w) </p><p>1.82" 46.2mm (l)</p><p></p><p></p><p><b>quality first is our tenet.</b>if for any reasons you are not satisfied,please give us an opportunity to improve your experience by contacting us. we will try our best to help you.</p><p></p><p>attention: due to different measurements, please accept 1-3cm error; please allow reasonable color difference as different computer screen may display different colors.</p>