Green Blob Outdoors (M10 1" 30mm DARK EARTH L-129) Scope Rings for Picatinny Rail for Burris, Nikon, Vortex, Leupold scopes Dark Earth M10 Scope Rings fit 30mm and 1" scope tubes and are hard coat finished to help prevent corrosion. Feature a crowned-rail interface which correctly engage 20mm rails. Tactical M10 Scope Rings hold firmly without damaging the scope. CNC machined from durable 7075 aircraft grade aluminum Center Height: 38mm (1.5")