Monstrum Dual Ring Scope Mount Compatible with Ruger 10/22 1 Inch Diameter Inline Rings Black. The rings are 1 inch in diameter for precision mounting of standard 1 inch tube scopes. The rings are offset two inches forward to provide more eye relief and more comfortable head placement. All Monstrum scope mounts and accessories come with a lifetime guarantee. Specifications for Monstrum Dual Ring Scope Mount: Manufacturer: Monstrum Color: Black Base/Mount Type: Scope Mount Tube Diameter: 1 in Features of Monstrum Dual Ring Scope Mount Installs directly into the factory mounting holes with no additional hardware or tooling required. 1 inch in diameter for precision mounting of standard 1 inch tube scopes. The rings are offset two inches forward to provide more eye relief and more comfortable head placement Package Contents: Monstrum Dual Ring Scope Mount What firearm models does the manufacturer say Monstrum Dual Ring Scope Mount is compatible with? The manufacturer says that Monstrum Dual Ring Scope Mount is compatible with Ruger 10/22 Marlin Model 336 Marlin Model 1895 Marlin Model 1894Monstrum RUG-06: Dual Ring Scope Mount Compatible with Ruger 10/22 1 Inch Diameter Inline Rings Black