Base Dimension: 18 1/2 inches
Bolt Circle Diameter: 12 inches
Bolt Pattern: 4 Bolt
Max Height: 14 feet
Shaft Max Outer Diameter: 5 1/2 inches
Spec for Madison 18" Bi-Metal Base - 16 Sharp Flute Shaft
Ordering sheet for Madison 18" Bi-Metal Base - 16 Sharp Flute Shaft