Taousa 70229 20mm/0.79in Rifle Scope Riser Mount Extended Flat Top Scope Weaver Length 145mm 14 Slots Includes 1x Scope Mount Base. Made from aircraft grade aluminum alloy. Quick detachable design allows instant attach & detach action. Length: Approx. 145mm (5.71inch), Height: Approx. 18mm (0.71inch), Rail Width: Approx. 20mm (0.79inch). 20mm top picatinny/weaver rail allow installation of scope / sight / Red Dots Sight. Taousa is a registered trademark owned by Taousa LLC. Unauthorized sellers are not allowed to list their products under this listing.