18" Ripple Coulter Blade
 
Key Features:
Fits Dawn 3-bolt hubs
 
Specifications:
Diameter - 18 in
Bolt Circle Diameter - 5 in
Bolt Hole Diameter - .52 in 
Pilot Hole Diameter - 2.81 in
Thickness - .177 in
Width - 1/2 in 
Pattern - 3 Bolt