Details:

The Black Rifle Tactical Flat Top Heavy Duty 30mm Cantilever Mount is precision CNC machined from high quality billet aircraft grade aluminum.
The Black Rifle Tactical Flat Top Heavy Duty 30mm Cantilever Mount is designed with heavy recoil and sustained fire in mind and will hold up in the most extreme circumstances.
The Black Rifle Tactical Flat Top Heavy Duty 30mm Cantilever Mount incorporates picatinny/weaver rail sections at the ring surfaces to allow for mounting of additional accessories.

Features:

Ring Diameter: 30mm(without insert)/1 inch(with insert)
Fits 20mm tubed scopes
FIT FOR Picatinny rail Scope which wide 20mm
Durable aircraft grade aluminum construction
Black Rifle Matte Finish