THIS KIT INCLUDES TWO MULCHING BLADES, AND ONE BELT. THE BELT REPLACES 174883, 531300767, 532174883. FITS MODELS AYP: DB24, PD24, PK20 AND PRZ0P WITH 42" DECKS, YTH1542XP WITH 42" DECKS. SPECIFICATIONS: BELT APPLICATION: DECK WIDTH: 5/8" LENGTH: 97". THE BLADES REPLACE 134149, 422719 532134149 AND 777134149. SPECS: LENGTH: 21" CENTER HOLE: 5 PT. STAR WIDTH: 2 1/4" THICKNESS: .134". FITS MODELS: AYP, CRAFTSMAN, POULAN AND POULAN PRO 42" DECKS. A 42" DECK REQUIRES 2 BLADES.Warning:Lead-Nickel-Cancer and Reproductive Harm