Feature: 1. Official for S9 Air Assist: It is an all metal structure and fits perfectly for S6 PRO and S9 laser. Installation is very simple and you only need a few minutes to install. 2. High Speed Air Assist Nozzle: Like for S10 nozzle, it is a high speed air assist nozzle with advanced fluid mechanics design. Only a 30L/min air pump can achieve a high speed airflow of 13.5m/s. 3. Faster and Cleaner: For S9 air assist will greatly improve the cutting ability of the for S9 laser. With air assist for S9 cuts plywood and MDF boards 2-3 times faster, and cutting surfaces are cleaner and no smoky. 4. Excellent Air Sealing: The for S9 nozzle has a sealing ring, and the air of the air pump will not leak from the gap. In addition, the sealing keeps out dust, which will increase the lifespan of the for S9 lens. 5. Complete Accessories for Air Assist Upgrade: The package includes for S9 air assist nozzle, air pipe, sealing ring and other installation accessories you need. You don't need to buy additional accessories, directly to upgrade for S9 machine. Specification: Specification: Air assisted copper tube outer diameter: 8mm Inner diameter of trachea: 7.5mm Air Pump: Note that when you buy the kit that includes an air pump you need to double check that the voltage matches your local voltage.. Package List: 1 x 30L/min air pump 1 x Nozzle Kit 1 x Acrylic Cover 1 x 1.5 meters pipe 1 x Tool Kit 1 x Manual Note: Because of the powerful laser with air assist, it is forbidden to run the engraving machine unattended. Pause it if you're not around.For detailed machine instructions, please refer to the manual for parameter settings.When operating the laser engraving machine, please wear protective goggles.Do not touch the laser with your hands, otherwise you may burn your hands.Please avoid strong impact on the machine.It is forbidden for children under 14 years old to use this product, and children over 14 years old need adult attended.Do not use the laser directly to any specular reflection object, which may cause injury to the operator or burn the laser.