Osprey Global Magnetic Ring Mount 30mm Tube Black. It comes with sturdy magnetic magnets attached to the ring mounts. Specifications for Osprey Global Magnetic Ring Mount: Manufacturer: Osprey Global Fabric/Material: 6061-T6 Aluminum Color: Black Tube Diameter: 30 mm Package Contents: Osprey Global Magnetic Ring Mount Allen Wrench Osprey Global Warranty At Osprey Global we will repair or replace your Osprey product in the event it becomes damaged or defective at no charge to you. If we cannot repair your product we will replace it with a product in perfect working order of equal or better physical condition. You see it doesn't matter how it happened whose fault it was or where you purchased it. You can count on our warranty for all Osprey Global rifle scopes tactical scopes compact first focal planes red dots lasers binoculars bore sights and accessories. See Full Warranty Information here. Osprey Global MM-OSP-30mm: Magnetic Ring Mount 30mm Tube Black