The Edge rings from Morr Accuracy feature strength with light weight. Finite element analysis ensures regidity where you need it and no extra weight where you don't. Available in 1" and 30mm tubes, straight or offset, and mount to either 11mm or 3/8" rails. The Edge 4 Screw rings are designed for centerfire benchrest shooters and utilize 4 screw ring caps. Average weight is 1.5oz. per pair for the Edge and 2.7 oz. per pair for the 4 screw models. Mfg: Morr Accuracy SPECS: Edge Rings: 1.45" Tall, from top of rail to center of ring. Edge Tall: 1.55" from top of rail to center of ring Edge Low: 1.15" from top of rail to center of ring. Edge Offset are .5" from center of action.