Lawn mower engine air filter and foam -cleaner set supersedes for part number of 591334, 796031, 594201, 5428K, 5428, 5421 and part number of MIU14395, MIU13038, GY21435, MIU13963Constructed with premium pleated filter paper, rubber and metal materials for an extended life and superior protection against the destructive effects of dirt ingestion, also can save on costly parts has the same proper fit and performance as partsMany engine performance problems can be linked to maintenance issues such as stale fuel, dirty air filter, fouled spark plug and deteriorated oil. At least a year you should replace the spark plug, clean or replace air filter, and check blades and belts for wear. A new spark plug and filter assure proper air-fuel mixture and help your engine run better and last .Compatibility: 1. Replace part number offor 591334, 796031, 594201, 5428K, 5428, 5421 MIU14395, MIU13038, GY21435, MIU13963 30-851 13644 7-08242 102-0122. Fits select for model 31 & 40 & 44 engines using round canister style air filter31A507, 31A607, 31A677, 31A707, 31A807, 31C707, 31E577, 31E607, 31E677, 31E777, 31G777, 401500, 405500, 406700, 407700,40N700,40N800,40R500,40R600, 40R700,40R800,445600,44N600,44N800, 44R500, 44R600, 44R700, 44R800 etc. including 13.5-19.5 Intek V-Twin engines and single cylinder OHV Vertical 17.5 engines3. Some suitable lawn mower tractor model YTA22V46, YTH22V46, YTH24V48 lawn mowers- Lawn Tractor, 13WN77KS011, 13WN77KS211 YARDMAN 13AO785T055 mower etc.Color: yellow + blackMaterial: plastic + sponge + metalSize about: about 12.7cm high; outer diameter 7.6cmPackage Contents:2pcs * Air filter elementOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.