AMF uses a numeric rating system designed to differentiate our coverstock strengths. F10 least aggressive - F90 most aggressive. Note: Core dynamics must be taken into account with shell strength when selecting equipment.
In the Night Hawk Stealth™ SE we took everyone's favorite Power Ring™ Core and wrapped it in the F78™ shell to provide all the lane hugging power needed on even the wettest of conditions. The Night Hawk Stealth SE provides that patented Night Hawk look and motion down lane. Expect to see a smooth control arc at the breakpoint, while the F78 shell will allow you to bite off more of the oil than previous Night Hawks.