1" (measured from the top of the picatinny to the centerline of the scope)
Specs: 20in/lbs (tighten bottom screws first)
Practical Aluminum Rings are machined from aluminum and anodized for a matte
rings are specifically made for 1" tube shotgun scopes. They are typically
shorter than standard rifle scopes and require taller rings for the objective
lens to clear the rails.