This is a A-B1AF31 Air Filter PN: B1AF31Main Description As Following : A-B1AF31 Air Filter P.N: B1AF31 Dim A (1): 2-5/8" LDim B (2): 1-1/2" WDim C (3): 1" Thick Crossed From: 1567 ROTARY , 23791 POULAN , 43010 LASER SALES , 43052 LASER SALES , 530 02 37-91 POULAN , 530-023791 POULAN , 5300237-91 POULAN , 530023791 POULAN , 55-224 OREGON , 55-613 OREGON , 55224 OREGON , 55613 OREGON , 605-428 STENS , 605428 STENS , 7-08370 PRIME LINE , 708370 PRIME LINE Found in Section & Models : Tractor Parts Associated Items : New Also This is An Aftermarket Product And : High Quality Afternaket Shipped from Both US and Canada