Green Blob Outdoors (M10 1" 30mm Black L-129) Scope Rings for Picatinny Rail for Burris, Nikon, Vortex, Leupold scopes 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")