2.5" NPSH Female LH x 4.5" NH (NST) Female LH Swivel Adapter Aluminum DMH25F25F and a double jacket hose

and a double jacket hose has an extra layer of polyester pulled over it making it double the thickness

Industrial & Fire Grade 4

Originally this hose was custom designed for supply lines for fire trucks

5" NPSH Female x 1

2.5" NPSH Female LH x 4.5" NH (NST) Female LH Swivel Adapter Aluminum DMH25F25F and a double jacket hoseSpecifications Female Side 1 2. 5 NPSH Female Swivel (National Pipe Straight Hose) Female Side 2 4. 5 NH (NST) Female Swivel (National Hose National Standard Thread) 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