Feature Heavy Duty, 30mm Diameter, 35mm 1.4 Center Height Low Profile 6 Torx Screws Per Ring, Extremely Accurate w/ Full CNC Machined, 1913 Picatinny Specification Diameter: 30mm Height: 35mm 1.4" from bottom to ring center Ring Width: 26mm 1" Weight (net): 165g / 5.8oz Finish: Black matte Material: 6061-T6 Mount: 1913 picatinny Unique construction provides strength well with steel cross-bolt Six torx screws per ring will hold your scope under any conceivable situations Perfect alignment and superior accuracy Do not use over 18 inch / pounds of torque on the scope rings&'; screws Fittings include: Hex key Suggest 25 inch / pounds (can accept max 45 inch / pounds) torque force for big nut when installing the mount on the picatinny rail Relations 30mm X-Accu 1.4" Low Profile Picatinny Scope Rings 30mm X-Accu 1.4" Medium Profile Picatinny Scope Rings