Dust Wipers are a standard part of FOX forks. They ensure a smooth feel and protect the longevity internals of the fork from outside elements like dirt and water. You can easily pick which kit you need by selecting your fork model.
FOX 32 Dust Wiper Kit: 803-00-944
FOX 34 Dust Wiper Kit: 803-00-945
FOX 36 Dust Wiper Kit: 803-00-933
FOX 38 Dust Wiper Kit: 803-01-493
FOX 40 Dust Wiper Kit: 803-00-946