30mm Scope High Weaver Picatinny Mount Ring 21mm Base

Specifications:
Tube Diameter: 30mm
Attaches to Rail: Picatinny/Weaver 
Height: High

Affordable Scope Mounts
High-durability Aluminum Alloy
Anodised Black for a Great Finish.

Height (from bottom to ring center): 36.5mm (1.43 inch)
OR
Height (from bottom to ring center): 36mm (1.41 inch)