Manufacturer: Weaver 49034
1" Low; Saddle height (in.): 0.089; Scope objective lens size: Up to 40mm. The most trusted scope mounts in the world. Wide top straps hold under the toughest recoil. To remove a Weaver detachable top-mounted scope, you just loosen two thumb nuts, and it's off. Remounting is just as easy. Tighten each thumb nut until both are snug, and you're back to zero.