Item Detail Table of Content Replacement 3" Caster for ZEN4520 Item Number: ZEN4145-3 Supplied by ZENDEX TOOL CORPORATION (see all) Price: $27.50* * log in for dealer pricing. Direct from 3rd Party Supplier Add To Cart DescriptionReplacement Caster for ZEN4520 Go-Jak Dolly. Locking nuts (2008-5K) not included. WarrantyWarranted against defects in material and workmanship