Homelite Air Filter part# 63589-B was used on the following Homelite Chainsaw models; SXL, XL-20, XL-15, XL-400, and XL500. Even if your model is listed here, all Homelite parts are UT and/or serial number specific. Please refer to a parts breakdown for your particular model and UT number to assure that this is the correct part for your machine before you order.