The foam cannon orifice and foam maker is to use and you can use for a long time. They can help you work more efficient and has proper size to replace with new . 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 PSI Orifice nozzle specifications: Orifice size: 1.1 mm, male NPT screw fitting, about 0.28 inch Colour:silver Material:Stainless steel Package 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 package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.