Ball Bearing 10*5*4 - for Redcat Racing Hurricane XTR. Also compatible with: TORNADO BB, TORNADO S30, VOLCANO SV, VOLCANO S30, VOLCANO MX, TSUNAMI, VOLCANO STX, SHOCKWAVE, LIGHTNING STR, SANDSTORM LT, MAELSTROM LT, LANDSLIDE LT, MONSOON XTR, HURRICANE XTR, LIGHTNING EP DRIFT, TSUNAMI EPX, LIGHTNING EPX, TORNADO EPX/EPX PRO, VOLCANO