Vortex Pro Series 30mm Extra High Rings Vortex's Pro Riflescope Rings are a great combination of quality and value for mounting a scope on a rifle. Machined from aircraft grade aluminum, Vortex Pro Riflescope Rings offer the reliability and strength that all hunters expect of their equipment. Features Precision Machined 7075 T6 Aluminum Hard Coat Matte Black Anodized Laser Engraved Torque Specifications Robust #8 Fasteners Integrated Recoil Lug Fits Weaver or Picatinny Rails 1.54"