Specification Brand : Replacement Parts BulletPoint1 : (2) Two Belts New Geared Timing Belts Size 3M-177-4, 3M1774, 177-3M-4, 1773M4 BulletPoint2 : 177 mm Pitch Length, 59 teeth, 3mm Pitch, 4mm Wide BulletPoint3 : Equal to 3M-177-04 HDT Synchronous Timing Belt, 177-3GT-04 HDT Timing belt, 177-3M-04 HDT Powergrip. BulletPoint4 : For use with all vacuum brands and types. Works with motorized and hand-held attachments. Like Shark 143FFJ and 119FFJ hand-held attachments. BulletPoint5 : These belts do not need to be replaced every 6-12 months CompatibleDevices : Vacuum Cleaner ExternallyAssignedProductIdentifier1 : 0369251500777 ExternallyAssignedProductIdentifier2 : 369251500777 ItemName : Replacement Parts (2) Two Belts 3M-177-4, 3M1774, 177-3M-4, 1773M4 New Geared Belts ItemTypeKeyword : household-central-vacuum-installation-parts Manufacturer : replacement parts ProductSiteLaunchDate : 2020-12-14T07:47:43.617Z SupplierDeclaredDgHzRegulation : not_applicable UnspscCode : 26111800