SHS Airsoft Version 2 Metal Cylinder Head AEG Gun Product Overview Manufacturer: SHS Material: Aluminum For Version 2 Gearboxes Double O-rings Has an o-ring on the back These high quality cylinder heads have double o-rings to provide the best air seal possible. They will perform similiar to extremely popular brands at a fraction of the cost. Details: Item Weight: 0.8 ounces Shipping Weight: 0.8 ounces Features: Material: Aluminum For Version 2 Gearboxes Double O-rings Has an o-ring on the back Made with JoeLister Quality Products Have peace of mind knowing that your order will arrive original factory sealed packaging. That means that you'll have the full force of the manufacturer's warranty to protect your purchase. Fast and Free Shipping You're already purchasing the item. Why pay additional for shipping, especially slow shipping? We get your order shipped out and delivered to your doorstep as quickly as possible. Commitment We are committed to making sure that you leave this transaction satisfied. That means having access to real people that get your questions and concerns answered quickly. Give us a shot and we will make sure that you will look to us again!