Wilkerson is a brand that manufactures inline air dryers sold through catalog distribution companies, such as Grainger, MSC, and McMaster-Carr.  Inline air dryers from Wilkerson and other brands typically use color changing silica gel beads, which turn from blue to pink.

When silica gel desiccant beads are pink they need to be either replaced or regenerated.  Applications for inline air dryers include spray painting, pneumatic tools, and abrasive blasting machines.

Desiccant for Wilkerson air dryers is for sale here.  You won't find a better deal online.  A 25 lbs. plastic pail costs $125 with free shipping to addresses in the lower 48 U.S. States.  Click here to make a purchase.