Function: - Over time, the rubber blower cap of the nozzle can become covered with grease and dirt and needs to be replaced. Extend the life of your equipment and reduce your money - Don't be nervous when the fire chief comes to check on your kitchen. Our rubber vent caps create a seal around the suppression nozzle to prevent grease build-up and clogging of the nozzle, which is critical for passing inspectionsFeature: - Made of high-quality rubber material, soft, high fit, easy to stretch, stable, wear-resistant, corrosion-resistant, longer use time and more efficient - Easy Installation: Put the cap on the nozzle, snap on, no need to tighten, high fit, install without tools, remove the old cap, wrap the ring around the nozzle and replace it with the cap on the end of the nozzle - Package includes: 20* blow caps - Satisfaction Guarantee: If there is any problem with your order, please contact me and I will correct it