Check the listing for details. 2Pcs High Profile 1inch/30mm Scope Rings Mount with Flat Top 20mm Picatinny Rail. Color: Black, Condition: New. Listed at 12.79 USD. Product Description Description: Model: M3022 Color: Black 49mm x 30mm x 62mm (L x W x H) Material: high quality aluminum Feature: Double scope ring mount for Picatinny/ Weaver (20mm). Design in hollowed-out configuration between the ring and the bottom of the base, to release heavy duty when clamping your scope. The ring is for most scopes which are in 25.4mm/30mm scope tube.To change the scope tube from 30mm to 25.4mm, you should only take away the inside ring. High profile, a gap from base of mount to bottom of rings. With 2 clamp screw and 2 scope clamp screw per side, ensure mount any 1'' scope firmly, just twist off the nut and mount the base on the 20mm Picatinny easily. Please carefully compare the size of our products and the installation dimensions of your equipment before buying. Package: 2 x Scope Rings mount