Orifice Nozzle: Universal about 1/4"NPT male thread. Orifice size is about 1.1 mm. Made of brass, work durably in the foam lance. Working Pressure is up to 3000 PSI. Foam Maker: Size of diameter x height is about 0.61"x0.41". Filtration accuracy is about 100. Made of stainless steel, work durably in the foam sprayer. Working Pressure is up to 3000 PSI. The orifice nozzle and foam maker will be a nice combination to help you work more efficient. They assembly inside foam cannon for foam generation. They creates thick foam suds that stick to your car. If foam cannon works not very well as before, maybe mesh filter wore down and foam cannon orifice tips blocked. You can replace them with new ones and it will recover. Warm tips: Please screw in the orifice nozzle tighten enough, or it is hard to get thick foam. Brass Foam Cannon Orifice Nozzle and Stainless Steel Foam Maker Universal Thread Tips for Snow Foam Lance (Pack of 2 Kit)