this O-ring is to provide a tight seal between components and is designed to fit Karcher models

12A-L2DQ766 (TB 490 XP)(2017) Lawn Mower

Please check the pictures carefully to be sure this part is right for your unit

M12-471537 Magnum Series Engine

26640B (3900001-3999999)(1993) Lawn Mower

537207501 Husqvarna Chainsaw Filter - CURRENTLY ON BACKORDER Availability_Currently on Back Order this O-ring is to provide537207501 Husqvarna Chainsaw Filter Specs Height 2 3 4" Length 3 1 4" Width 3 3 8" Replaces 605 080, 537207501 Fits Models Husqvarna 570 (2005 04) Chainsaw 570 (2007 01) Chainsaw 570 (2008 08) Chainsaw 570 EPA (2004 09) Chainsaw 570 EPA (2005 04) Chainsaw 570 EPA (2008 08) Chainsaw 570 XP (2007 01) Chainsaw 575 XP (2005 04) Chainsaw 575 XP (2007 01) Chainsaw 575 XP EPA (2004 09) Chainsaw 575 XP EPA (2007 01) Chainsaw 575 XP EPA (2005 04) Chainsaw 576