1" Aluminum Fire Hose Nozzle 10 to 24 GPM Red FM4040F Single wall and layers of

Single wall and layers of cotton

Maximum burst test requirements for 4" and 5" diameters shall be 900 psi / 62 bar

The difference is just that

Industrial & Fire 2” NH (NST) Female Swivel x 1

1" Aluminum Fire Hose Nozzle 10 to 24 GPM Red FM4040F Single wall and layers of1" Aluminum Maroon Fire Hose Nozzle For Industrial & Firefighting Use (No Bumper) This durable & economical nozzle has 3 adjustable twist settings: Straight Stream Fog Spray Shut Off This dual flow fire nozzle can push 24 gallons per minute at 100 PSI. Dual flow nozzles starting from the off position twist to Low Flow Straight Stream, to Low Flow Partial Fog, to High Flow Straight Stream to High Flow Fog. Technical Specifications Inlet Size Choose 1"