Air Filter / Echo 13031038331Pack Size:1Echo 13031038331J. Thomas CS-5319, NHC 203-7131Echo CS4400 and CS510OD: 2 1/2 ", Height: 1 3/8 ", Tall version, ID: 1 3/4 " STENS 605-319

Echo Chainsaw Air Filter CS-440, 450, 530, 520