• Fuel/Oxygen
• Hydrogen/Oxygen (HT-0 thru HT-3 only)
• Oxy/Acetylene (HT-0 thru HT-3 only)
• 7/16-24 (Female) Thd. Connection

HT Series tips have smaller orifices than National’s other tips which gives the HT tips a quieter, tighter burning pattern.