The Su-VGun Service Kit contains the tools, instructions and parts you need to remove and replace the serviceable input and output orifices in the Su-VGun to keep it working in top condition.
Output nozzle
Gas input connector parts
Check valve ball
If you use your Su-VGun a lot, you will likely need to clean it internally or unclog the output due to dirt, oil, or other contamination. This kit come with the instruction and help video that you need to make the repairs.
Propane bottle and tanks will occasionally have debris of some sort that will get into the torch and this is just what you need to service it yourself.