Designed to withstand even the heaviest recoiling rifles, Leupold Standard Rings are constructed of machined steel. Stronger than aluminum, steel rings are perfect for locking your scope solidly into place. The front ring is dovetail style while the rear is windage adjustable. Leupold Standard Rings are ideal for use with Leupold Standard Bases.Specifications and Features: Ring Style: Standard Height: High Tube Diameter: 30mm