Weaver Four Hole Skeleton Rings (30mm Medium Height) Made of the highest quality materials Hunting scopes rings Another quality Bushnell product Available in heights that satisfy just about any shooter and shooting situation: medium, high, X-high, and XX-high Skeletal design lessens weight without losing strength Dressed in matte black and featuring no strip/slip Torx screws Incorporate Weavers famous Cross-lock design and lightweight aircraft aluminum Choose between 1" and 30mm