XTS 30mm - 1 in Multi-Sized Uni-Mount Scope Rings Black. Single mount point. Fits scopes with 1 inch tubes or 30mm tubes ensuring compatibility across a wide range of optics.. Specifications for XTS 30mm - 1 in Multi-Sized Universal Rifle Scope Mount Rings: Manufacturer: XTS Color: Black Tube Diameter: 1 in 30 mm Package Contents: 30mm - 1 in Multi-Sized Universal Rifle Scope Mount Rings Allen key XTS XTS-1IN-30MM: 30mm - 1 in Multi-Sized Uni-Mount Scope Rings Black