MANUFACTURER: Christensen Arms FAMILY: Accessories MODEL: Rings TYPE: Accessory-Rings & Ring Mounts ITEM GROUP: Scope Rings FINISH: Black FINISH TYPE: Black MAINTUBE SIZE: 30mm SHIPPING WEIGHT: 0.33 lbs. ADDL INFO: Ultralight Scope Rings ADDL INFO: 30mm Low MFG MODEL NO: 810-00041-02 UPC: 691328235245