Check the listing for details. DIFFUSER KIT for Harbor Freight Powder Coat Gun. Condition: New. Listed at 22.50 USD. This is another design by Cycle Fab Mfg. to improve the efficency of the HARBOR FREIGHT POWDER COATING SYSTEM! The DIFFUSER KIT helps the HARBOR FREIGHT atomize the powder particals better so you get a more even distribution of powder onto your part and energizes those particals with greater ease by increasing the surface area of the electrode. The Column part of this kit works in conjunction with the Diffuser to concentrate more of your powder onto your part's surface. The difference that this KIT makes is outstanding! This KIT fits the Harbor Freight (Chicago) Powder Coating System / Model# 94244 Check out the video on YouTube of the Diffuser and Mixing Tube working together. The Mixing Tube is another product from Cycle Fab that complements the Diffuser.