Precision Matched 30mm, High,1.26in.

Machined with certified USA 7075 T6 billet aluminum and held to an extremely tight tolerance of .0005 inches using a precision Computer Numeric Controlled (CNC) mill. These Vortex rings are then serialized, vibratory tumbled, bead blasted and finished with a Type III hard coat anodize. 
Rugged, lightweight, anti-snag design
Robust, Grade 8 fasteners
100% made in USA guaranteed for life 
TORQUE SPECS 
Base Clamp Screws | 45-50 in/lbs
Ring Screws | 15-18 in/lbs