Dophee QD 5 Slot Riser Rifle Scope Base Mount Adapter for 20mm Picatinny Weaver Rail Fits most Weaver and Picatinny Rails. Lever Lock Quick Detach Design. Provides steady and solid mount. Material: Aluminum. Rail width: 20mm/0.79". Rail Length: 60mm/2.36". Size: 6.6X5X2.1cm/2.6" X 1.97" X 0.83". Note: NO Retail Box. Packed Safely in Bubble Bag.