DVR108 Works with both Losmandy Style D Series and Vixen Style Series plates. 108mm (4.25") I.D. rings with three point adjustment. Adjustment screws made of 7075 aluminum (85% stronger then 6061), with machined 1/4" delrin tips. 2 rings per set, Quick dovetail mounting, no tools needed. Machined Aluminum for strength and light weight. I.D. size from 2.96" TO 4.32". Height from top of dovetail plate to center of rings: D plates=3.437" V plates=3.187". Weight 29 oz per set
