Vism 30mm Tactical Riflescope Rings mount on either Weaver or Picatinny rails. Removable 1 inch inserts make these Riflescope Rings from Vism useable with both 30mm and 1 inch diameter riflescope tubes. Vism 30mm Tactical Riflescope Ring Sets are made of black anodized aluminum. Use Vism Tactical 30mm Riflescope Rings to mount the riflescope of your choice.Specifications: Set of two 0.9 inch rings: 1.8 inch overall height, 2.1 ounce weight Set of two 1.1 inch rings: 2.1 inch overall height, 2.3 ounce weight Set of two 1.3 inch rings: 2.2 inch overall height, 2.4 ounce weight Set of two 1.5 inch rings: 2.4 inch overall height, 2.5 ounce weightSpecifications: Vism Tactical Riflescope 30mm Rings Mounting tool