Weaver's popular four hole rings are now available in heights for just about any shooter and shooting situation.Choose from among 1" or 30mm and medium high extra-high and xx-high.Dressed in matte black and featuring no strip/slip torx screws these new rings incorporate weaver's famous cross-lock design and lightweight aircraft grade aluminum.Type: Ring SetTube Diameter: 30mmHeight: X-HighSize: 30mmFinish: Matte BlackStyle: WeaverMaterial: AluminumStyle Description: TacticalOne Or Two Piece: 2Lock Type: Cross Lock