DOP60-427 Murray / Noma Throttle Control. Metal conduit (heavy duty version of our # DOP60-420), fits most Murray walk behind mowers, converts from positive to negative action - 1985 to present, use with # DOP04-304 mounting adapter. Size: Conduit Size: 3/16", Conduit Length: 71" , Innerwire: 53-1/2", Wire Travel: 1-5/8". Replaces # 420005.