HQRP 2-Pack Air Filter Cartridge for Toro 16400 16401 16402 16403 16404 20010 20020 20021 20022 20023 20023C 20025 20028 20029 20086 20087 20089 Series Lawn Mower Coaster HQRP&reg; Flat Air Filter Cartridge plus HQRP&reg; Coaster; This air filter is a commonly used part for small engines installed on lawn and garden equipment; Help eliminate dirt, dust and debris from contaminating the carburetor and damaging the engine; Dimensions: 4 1/2 " x 5 1/4" x 1". Replaces Briggs & Stratton #(s) 491588, 491588S, 399959, 4101, 5043B, 5043D, 5043H; Toro #(s) 119-1909; Can be cleaned a time or two by using an air supply. But it is advised to replace it once it becomes dirty; Compatible with Original filter; 2 weeks DOA replacement warranty!