DEMO Rubicon Precision Manufacturing 35mm Riflescope Rings w/Co-Linear Bubble Level Medium - 1.00in Set of 2 Black. Level significantly aids in accurate scope mounting by giving reference to the cant during the scope mounting process while eliminating the need for multiple small levels and balancing acts Specifications for Rubicon Precision Manufacturing 35mm Riflescope Rings w/Co-Linear Bubble Level: Manufacturer: Rubicon Precision Manufacturing Base/Mount Type: Riflescope Ring Tube Diameter: 35 mm Ring Quantity: Pair Ring Type: Rings Fabric/Material: 6061-T6 Aluminum Features of Rubicon Precision Manufacturing 35mm Riflescope Rings w/Co-Linear Bubble Level Alignment lug to ensure cap/base alignment during cap screw installation Package Contents: Rubicon Precision Manufacturing 35mm Riflescope Rings w/Co-Linear Bubble Level Rubicon Precision Manufacturing CLR-35100: 35mm Riflescope Rings w/Co-Linear Bubble Level Medium - 1.00in Set of 2 Black