Husqvarna 539103290 Lawn Tractor Mandrel Shaft Genuine Original Equipment Manufacturer (OEM) Part This part is compatible with models including; ZTHQL4221A (968999172),968999172,968999170,ZTHKH4820A (968999158),ZTHQL4218A (968999170),968999158,968999169,ZTHKH4818A (968999157),968999157,968999168,ZTHKW4818A (968999168),ZTHKW4821A (968999169) Mandrel shaft 539103290 rotates the blade under the mower deck Genuine Original Equipment Manufacturer (OEM) part. Compatible Brands: Husqvarna This mandrel shaft (part number 539103290) is for lawn tractors Mandrel shaft 539103290 doesn't include the bearing