Sportsmatch 1" Rings, Medium, 11mm Dovetail, Fits FWB Sport & Webley Patriot 1" rings, Medium profile, Fits 11mm dovetail, 21mm long 4 hex screws/ring cap secure your scope, 3.53 oz. 2 hex screws secure each ring base Fits shallow cuts in certain scope dovetails/rails, such as those on the Webley Patriot and FWB Sport air rifles 17mm from base of ring to bottom of scope tube