Upgrade from Bushings or Replace Worn Bearings with Bearings from Duratrax. FEATURES: Ball bearings reduce friction and last longer than bushings. Chrome steel construction. Sealed for protection against dirt and moisture Available in many popular sizes for most R/C applications. 90 Day Warranty INCLUDES: Ten 5 x 11 x 4 bearings COMMENTS: To clean bearings use DTXC2458 Power Shot Cleaner. ir/jl