UTG RGWM-25M4 Medium Profile Ring Set Dia 1" Black Matte Anodized Leapers Medium Profile Picatinny/Weaver Rings Are constructed Of Aluminum Alloy With a Black Matte Anodize Finish. The Hex screws With Retention Has a Full Length Locking Plate. Type: Ring Set Tube Diameter: 1" Height: Medium Finish: Black Matte Anodized Style: Weaver And Picatinny Material: Aluminum One Or Two Piece: Pair