Spacer-Felt 03/05/08/1023 Sp Ak524, Series Not Applicable, Compatible with Grainger Part Number 33K853, 33K854, 33K861, 33K864, 33K865, Product Type Felt Filter Element, Compatible with Manufacturer Part Number 0523-101Q-G588NDX, 1023-101Q-G608NEX, 1423-101Q-G625, 1423-101Q-G626X, AT05-101-G215DX, Compatible with Series Not Applicable, Compatible with Brand Gast