THIS KIT INCLUDES TWO PADDLE IMPELLER AUGER HALVES AND ONE SCRAPER BAR. THE IMPELLERS REPLACE PART NUMBERS 03807000 AND 03800100. AND THE SCRAPER BAR REPLACES PART NUMBERS 03809400, 038094, 03813800 AND 13168. LENGTH: 21 5/8" WIDTH: 2 3/8". FITS MANY OF THE ARIENS SINGLE STAGE THROWERS INCLUDING S322, 322E, 522, S522E AND 722E. SNOW THROWERS, BLOWERS REQUIRE TWO PADDLES. PLEASE EMAIL YOUR MODEL NUMBER IF UNSURE.