Each box contains 2 pieces of the adapter, making it a convenient and cost-effective solution for rail conversion. The 11mm to 20mm Mini Aluminum Alloy Adapter Mount is designed to easily convert 11mm rail to 20mm rail. perfect for enhancing the versatility of your optimizing accessory compatibility. Made of high-quality aluminum alloy, it provides a stable and mount for attaching accessories such as scopes. Compact and , convenient to carry, Weight: 0.07495716908 pounds, Manufacturer: Huudngeje