Vector Optics X-Accu Adjustable Elevation 30mm 9-11mm Dovetail MountsThis mount has an adjustable elevation height from 35 to 41 mm, measured from the bottom of the mount to the centre of the ring. It is 30 mm in diameter. It has an adjustment range of 6 mm and is CNC machined out of 6061 T6 aluminium. The dovetail clamp can be tightened with two torx screws and, at 26 mm, it is extra wide, providing a bigger clamping surface so the six screws only need to be tightened with 2 Nm. Specifications: Rail : Dovetail (9