Super heavy duty RST Fuji Tip Tops are the perfect choice for big game trolling and standup applications. Fuji RST tip tops utilize Silicone Carbide rings - one of the most advanced ceramics on the market today. Diamond Polished SiC rings are mounted directly to the gunsmoke stainless steel frame of the Fuji RST which reduces weight, increases heat dissipation, and intensifies line sensitivity.