2.5" Storz x 2.5" NPSH Female (Swivel) Adapter Aluminum NPT x NPSH Available Threaded Sizes (Inside Diameter):

Available Threaded Sizes (Inside Diameter): 5" Female NPT (National Pipe Tapered)

Male Side 2 – 4” NPT Male (National Pipe Tapered)

5” NH (NST) Female Long Handle x 4” NPSH Female Long Handle Swivel Fitting Anodized Aluminum

Test Pressure - 500 psi

This tunnel can absolutely hold flexible solar panels

2.5" Storz x 2.5" NPSH Female (Swivel) Adapter Aluminum NPT x NPSH Available Threaded Sizes (Inside Diameter):Specifications Storz Side 1 2. 5 Storz Female Side 2 2. 5 NPSH Female Swivel (National Pipe Straight Hose) 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