Item Detail Table of Content Replacement 3" Caster for ZEN4520 Item Number: ZEN4145-3 Supplied by ZENDEX TOOL CORPORATION (see all) Superseded To: ZEN4145-3-LN DescriptionReplacement Caster for ZEN4520 Go-Jak Dolly. Locking nuts (2008-5K) not included. WarrantyWarranted against defects in material and workmanshipWarrantyWarranted against defects in material and workmanship