Vanshly，6-191 6-190 Trailer Wheel Axle Nuts and Retainers Compatible With 2K To 8K Dexter Axle electronics_update_2023 It helps relieve pressure in

It helps relieve pressure in the fuel tank and improves safety by avoiding fuel spills in the event of an accident

Reduces exhaust noise

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Vanshly，6-191 6-190 Trailer Wheel Axle Nuts and Retainers Compatible With 2K To 8K Dexter Axle electronics_update_2023 It helps relieve pressure inVanshly6 191 6 190 Trailer Wheel Axle Nuts and Retainers Compatible With 2K To 8K Dexter Axle Product Features Part Number: 6 191 6 190 Compatible With: Fits Most axles from 2K To 8K 8K After Aug. 2003 Product Advantage: With this new nut and retainer,you do not need the cotter pin and the retainers clip over top of the nut after you have the nut set, it is a lot better and lasts longer then the cotter pin. High Quality: Made of high quality