Ruger 90290 4KHM Scope Ring Silver 1" Medium
http://www.tandktactical.com/shop/736676902903-ruger-90290-4khm-scope-ring-silver-1-medium-7889
http://www.tandktactical.com/web/image/product.template/7889/image_1920?unique=1cbb464
Designed to fit a scope with a 1" scope tube diameter and a 42 MM objective diameter.
