Make sure these are the size nozzles you need.  The majority of surface cleaner bars use 1/4" threaded , not 1/8".  These are 1/8".  Any questions call or text us. Surface Cleaner Nozzles by Wash Jet.  Hardened stainless steel nozzle ensures consistent accurate orifice size. 4000 PSI Orifice Recessed for Protection Flow-Rated Tolerance of +2% at 70°F Hard Edge Pattern, light center requires overlap to cover center 400 Series Stainless Steel Are you starting a pressure washing business? Check out my Online Pressure Washing School that will help you drastically cut your learning curve. You can also get some great pressure washing tips and tricks at my YouTube Channel. As always, if you have any questions I can help you with, please use our CONTACT FORM.