4" Storz x 3.5" NPT Female Adapter Aluminum 6" Inch Storz Both hoses have treated polyester

Both hoses have treated polyester materials which are 100% mildew & mold immune and will never require drying

Industrial & Fire 6” NPSH Female x 5" NPT Male Fitting Anodized Aluminum

It's easily kept clean and never needs to be dried because it's immune to mold and rot

So for simplicity sake

Reduce Threads From 2

4" Storz x 3.5" NPT Female Adapter Aluminum 6" Inch Storz Both hoses have treated polyesterSpecifications Storz Side 1 4 Storz Female Side 2 3. 5 NPT Female (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