It is a special machine for engine Intake pipe and intake valve back side clean. This is a closed loop. Walnut powder will impact carbon deposition on inner wall of intake pipe. After thousands of impact, carbon deposition will be clear thoroughly.
Walnut Sand Pellets for AUTOOL HTS518 HTS558 HTS678 Walnut Sand Blasting Machine
Walnut Shell Sandblasting Media 2.2lbs for Walnut Sand Blasting Machine HTS558
AUTOOL HST678 Walnut Sand Blasting Machine Car Engine Intake Valve Cleaning US
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