Greenough 4A 8.5" Blue Size:8.5" The side “strakes” act to

The side “strakes” act to keep water from spilling off the outer edge of the fin on the down stroke

Model ROCKET FISH HIGH PERFORMANCE Length 1447 mm Running Length 950 mm EF

An introduction to OM by Peter Sutherland

From The North Shore

archery and practically everything

Greenough 4A 8.5" Blue Size:8.5" The side “strakes” act toThere is a reason this is the most iconic, functional and versatile single fin available it works on just about anything! The Greenough 4 A has been our bread and butter for close to 40 years now, and is still the most popular single fin design there is. A truly well balanced fin the full base coupled with the tapering, moderately flexible tip provides a solid amount of drive off the bottom, and an acute responsiveness through arcing turns. Designed