Air filter AH19847 cross reference

[frank b]

I needed an air filter for my old 170 skid steer and found all these numbers that cross. NAPA 2276 Wix 42276 Clark 1642645 Baldwin PA1690FN Lubliner LAF1275 Fram CA256 Fleetguard AF435K Donaldson P181050 Purolater A42019 Autozone could order the the fram for $34.99, NAPA had the 2276 for $26.99, but i went to Advance Auto and they had the Purolater A42019 on the shelf for $4.99 !!!! I opened the box and it was a Donaldson filter too !!!