Comparison X-Accu 25.4mm Scope Rings Type Model Item Height(from bottom to ring center) Ring Width Weight X-AccuTM Elite 25.4mm Scope Rings XASR-2501 25.4mm X-Accu 1" Profile Picatinny Rings 25.4mm 1.0&';&'; 16.5mm 0.6&';&'; 85g / 3.0oz XASR-2502 25.4mm X-Accu 1.25" Profile Picatinny Rings 32mm 1.25&';&'; 16.5mm 0.6&';&'; 95g / 3.3oz XASR-2503 25.4mm X-Accu 1.4" Profile Picatinny Rings 35mm 1.4" 16.5mm 0.6&';&'; 100g / 3.5oz SPECIFICATIONS Diameter: 25.4mm 1in Height: 25.4mm 1.0&';&';/32mm 1.25&';&';/35mm 1.4" from bottom to ring center Ring Width: 16.5mm 0.6in Weight (net): 85g / 3.0oz, 95g / 3.3oz,100g / 3.5oz Finish: Black matte Material: 6061-T6 Mount: 1913 picatinny Unique construction provides strength well with steel cross-bolt Four torx screws per ring will hold your scope under any conceivable situations Perfect alignment and superior accuracy (check photo for reference, one nut on the left, the other nut on the right, still both rings&'; center aligned each other) Do not use over 18 inch / pounds of torque on the scope rings&'; screws Accessory: Torx T10 wrench Suggest 25 inch / pounds (can accept max 45 inch / pounds) torque force for big nut when installing the mount on the picatinny rail