Features: brand new and high quality Improves airflow and prolongs engine life by providing clean filtered air while running. Model # BS- 591334 796031 594201 797704 lawn mower genuine air filter, part # 5428K 5428 5421. Fit 31 vertical 13.5 for hp to 19.5 for hp and intek v-twins 16 for hp to 24 for hp engine element. Constructed with premium pleated filter paper, rubber and metal materials, for an extended life and provide superior for protection against the destructive effects of dirt ingestion. It can save on costly OEM parts but has the same proper fit and performance as OEM parts. Fits select model 31 & 40 & 44 engines using round canister style air filter, including 13.5-19.5 for HP Intek V-Twin engines and single cylinder OHV Vertical 17.5 for HP engines. Specifications: Material:Sponge + Plastic + Iron Color:as the Picture Show Length:12.7cm/5inches Package Includes: 1 Set Air Filter + Pre Cleaner note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.