Made of high-quality aluminum alloy, it provides a stable and mount for attaching accessories such as scopes. The 11mm to 20mm Mini Aluminum Alloy Adapter Mount is designed to easily convert 11mm rail to 20mm rail. Each box contains 2 pieces of the adapter, making it a convenient and cost-effective solution for rail conversion. perfect for enhancing the versatility of your optimizing accessory compatibility. Compact and , convenient to carry Feature: , , Easy to Use Material: Aluminum Alloy Type: Scope Mounts & Accessories Colour:Black Package Contents: 2 x Bracket Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.