Fits: Humminbird- Onix and Ion series
-100% Made in the USA-CNC machined aircraft grade aluminum
-Hard Anodized
-Lifetime Warranty
Onix/Ion Series (Silver)
$210.00Price
Round Base: 3.75" Round (same hole pattern as 2.25" ball RAM)
Bullet Base: 3.75" x 2.1875" Rectangle (2.5" x 1.5" 4-hole pattern)