TufForce RG-W25M15T3 - 1" Medium Weaver Ring with Rail On Top Fit for Weaver/Picatinny Base , Two rings in one package 3 Slots Rail On Top of one ring 1" scope Ring, Medium Profile, 15 mm / 5/8" high 20 mm wide base, 4 - M4 screws, Allen Wrench Included Black , Lightweight and Extra-Durable, 6061 Aircraft Aluminum, hard coating