Filter Element, Replacement Cartridge, Paper Element Material, Inside Dia. (In.) 3 in, Outside Dia. (In.) 4 3/8 in, Height (In.) 2 5/16 in, For Use With 5Z660, 5Z661, FS-15-100, Mfr. No. FS-15-075, VFD2S, VFD3S, For Use with Blower No. 5Z660, 5Z661, FS-15-075, FS-15-100, VFD2S, VFD3S