The foam cannon orifice and foam maker is durable for you to use and you can use for a long time. They can help you work more efficient and has proper size for you to replace with new ones. How to replace foam maker: 1. Pull the inner core out of plastic coat. 2. Pull out the plastic coat and find the foam maker. 3. Replace with new one. 4. Install the Plastic coat and inner core. How to replace orifice nozzle: 1. Unscrew quick connect plug. 2. Unscrew orifice nozzle with slot screwdriver. 3. Screw new orifice nozzle. 4. Screw quick disconnect plug. Specifications: Foam maker specifications: Diameter: 0.61 inch Height: 0.41 inch Working pressure is up to 3000 Orifice nozzle specifications: Orifice size: 1.1 mm, male screw fitting, about 0.28 inch Colour:silver Material:Stainless steel Contents: 10 * Foam maker (mesh filter) 4 * Orifice nozzle tips (foam generator nozzle) Note: Serious injury may come from high pressure discharge produced by pressure washers. Please keep out of the reach of human body. Only the above content, other are not included. Note: Light and different displays may the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.