This is the optional Mega Metal Horn for the Hitec HS-805 1/4 scale Servo. FEATURES: Constructed of aluminum, blue in color Three linkage holes per side INCLUDES: Mega Metal Double Sided Horn REQUIRES: Fastening to output spline of servo SPECS: Total Length: 2.2" (55mm) Length from Mounting Hole: 1.1" (27.5") jxs 09/26/11 ir/jxs