Fixed Scope Rings 30mm Ultra High 1.4 Inch. Made from hard-anodized aircraft-grade 7075 aluminum, their large surface area provides even pressure and great clamping force. Four Torx-head cap screws hold your scope even under the most severe recoil. The scope rings are 1.4 inch high. The rings can be used on all Picatinny 1913 accessory rails.