1 Inch Scope Low Weaver Picatinny Mount Ring 21mm Base

Specifications:
Tube Diameter: 25mm / 1 Inch
Attaches to Rail: Picatinny/Weaver 
Height: Low

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

Height (from bottom to ring center): 22mm (0.86 inch)
OR
Height (from bottom to ring center): 22.5mm (0.88 inch)