AF25551 Air Filter Primary: Overall Length274.31 mm (10.8 inch), Largest OD104.9 mm (4.13 inch), Largest ID 63.5 mm (2.5 inch), Primary Applications BOBCAT 6672467. Primary Air Filter Used With AF25552-. Filter Used With AH19083- AH19084, Primary AH19085-AH19086 Primary. AF25552 Air Filter Secondary: Overall Length262.88 mm (10.35 inch), Largest OD60.7 mm (2.39 inch), Largest ID46 mm (1.811 inch), Outside Seal Diameter 60.7 mm (2.39 inch), Secondary Element Used With AF25551-. Filter Used With AH19084 Secondary, AH19086 Secondary.