montageringe 25 4 mm hoj 11 mm fodVector Optics has produced some solid mounting rings in 6063 T6 aircraft grade aluminum. They are solid and are screwed together with 4 screws to secure the scope better. They also come with thumbscrews to screw onto the rail. It fits 25. 4 mm tubes (1"), which is the most common. The base of the mounting rings is 11 mm dovetail, which means they fit many different air rifles, e. g. They have a height of 34 mm.