One new aftermarket replacement air filter. Fits Tractor Models: 2000, 2110, 2120, 230A, 230B, 2600, 3120, 333, 335, 340, 340A, 340B, 3600, 3900, 445 Diesel, 445A Diesel, 445C, 445D, 450, 4600, 515, 530A, 530B, 531, 532, 535, 540 Diesel, 540A Diesel, 540B Diesel, 545, 545A, 545C, 545D, 550, 555. Please Note: May or May not fit 3000 model. Fits Loader Models: 345C, 345DTechnical Information:ID: 7/16″OD: 5-5/16″Length: 11-1/2″Replaces Parts: D5NN9601A