Quick Release 30mm/25mm 1" Rings for 20mm Weaver/picatinny Rail Scope Mount Qd Quick Release Lever allow fast installation & detachment O-Ring Sealed Spare Bttrly Compartment Adjustable QD Lever Fits 30mm /(25mm) adjustable Diameter O-Ring Scope Suitable for 30mm/25mm (1") Tactical Flashlight & Laser Sight Tube Mounting Need Also it is great for use for tactical flashlight or Laser sight Fully adjustable with nuts & screws included Lightweight, Shock absorption ability Install on all 20mm Weaver Rail, Scope Rail & RIS Rails Color: Black Mount Material: Aluminum Alloy Rail Type: 20mm Weaver Standard Rail Mounts to: Weaver or Picatinny Rail Ring Diameter: 25mm (1") O-Ring Scope Diameter: 25mm/30mm adjustable Mount Size: 50mm x 48mm x 22mm Weight: 70g Package include: 1 x Quick Release O-Ring Scope for Weaver Picatinny Rail 1 x Hex Wrench