I upgraded my Harbor Freight blasting cabinet with a USA cabinet gun & pickup tube upgrade kit from TP Tools. The kit came with a new Skat gun, siphon hose, and pickup tube. There were also two extra nozzles. The kit comes with a medium size air jet and nozzles for a 10-15 cfm compressor. Small and large sizes are available separately.
Installation was quick and easy and the performance increase was dramatic. Running aluminum oxide through this gun, I was stripping mill scale from hot rolled steel in the blink of an eye.