Material: the outer part is rubber, the yellow part is aluminum alloy, and the inner silver part is aluminum alloy and ceramic. Specifications: 1/4 " quick connect design, used for pressure washers up to 3600 PSI, gallons per minute: 3.0, nozzle hole size: 4.0 Function: The nozzle rotates in a circular motion with a powerful 0 jet to break down hard dirt and grime. Wide application: very suitable for billboards, car wash, floor, walls, flooring, roof cleaning, watering flowers, etc. Package Included: 1 x Turbo Washer Head Nozzle. Size: Hole Diameter 040 Description: Maximum pressure: 3000 PSI 3.0 gallons per minute Maximum temperature: 212 F 1/4 " " steel / plated brass quick connect plug Nozzle rotates a powerful 0 jet in a circular motion to remove stubborn dirt and grime By rotating the discharge water, the spray adds extra washing capacity to the cleaning process Provides 200% cleaning efficiency on a 25 flat fan nozzle Specifications Material: External: rubber Yellow part: aluminum alloy, Internal silver part: aluminum alloy + ceramic Compatible with: for high pressure cleaners Type: 4.0 Maximum pressure: 3000PSI / 250bar Screw connection: 1/4 " " BSP GMP: 3000PSI Package included: 1 x Turbo washer head nozzle