The 4″ is the smallest of the KoneZone trolling flashers. It effectively replaces many of the standard trolling dodgers. It is a favorite of California Halibut and Kokanee fishermen. I use them for Kokanee Trout, Rainbow Trout, Lake Trout and Dolly Varden on an Ultra Light Trout Rod. I use a Steelhead Rod for Mackinaw in the High Lakes of Oregon and Washington. For King and Coho Salmon I will use my G. Loomis STR 1086 C. Used this way you won’t even know the flasher is there. Pictured is the Green/ Chameleon UV. Ultra Violet light reflects off of this special tape in a way that will drive the fish to bite. UV Light penetrates the water column more efficiently at all depths in comparison to the standard light humans can see. Fish use the UV light in many ways to identify prey they hunt and to avoid predators to survive.