2" NPT Male Pipe Lightweight Aluminum Fire Plug 1" Inch Storz but if you're using heavy

but if you're using heavy duty fixed systems

Female Swivel Side 2 – 3” NPSH Female (National Pipe For Straight Hose)

Superior corrosion resistance to salt and chemicals

What Is A Red Rubber Covered Fire Hose

The color of the inside liner could also be black

2" NPT Male Pipe Lightweight Aluminum Fire Plug 1" Inch Storz but if you're using heavySpecifications Male Side 2 NPT Male (National Pipe Tapered) Working Pressure 300PSI Max Test Pressure 1000PSI Max Material T 6061 Aluminum (Aircraft Grade) Finishing Anodized (99. 9% Lead Free) NFPA Standards 1963, 4. 12, 5. 1 5. 6. 4 (Corrosion Resistance) Military Standards MIL A 8625 Type III, Class 1 Industrial Standards International ASTM B221 UL Labs Standards 236 8. 1 Through 8. 2 USDA Standards 5100 190C Tables 1 4 Origin Made In The USA