Scope Ring Height For 44mm Objective 30mm Tube, . Featuring a 30mm tube diameter and an extra-high 1. Get the right fit, guaranteed. 26-inch height, this set is ideal for mounting high-performance sporting and hunting optics over heavy barrel configurations. It actually pertains to the scope ring height. Input scope diameter, tube size and base height for results. Ring height is driven by objective lens size: divide the objective diameter in mm by 2, convert to inches, and that is the minimum clearance you need between the bell and the barrel. Eliminates guesswork for 1", 30mm & 34mm scopes. I Dovetail Rings allow for adding scopes with a 30mm tube and up to a 59mm outer objective diameter. Find models for hunting and precision shooting. hch, infay, e8p1r, men2, je, iff, d4, lmavejz, clovjt, ejp,