NoteThis kit Does Not included the Air pumpNotice 1 Because of the powerful laser with air assist it is forbidden to run the engraving machine unattended Stop it if you re not around 2 For detailed machine instructions please refer to the manual for parameter settings 3 When operating the laser engraving machine please wear protective goggles 4 Do not touch the laser with your hands otherwise you may burn your hands 5 Please avoid a strong impact on the machine 6 It is forbidden for children under 14 years old to use this product and children over 14 years old need adults attention 7 Do not use the laser directly on any specular reflection object which may cause injury to the operator or burn the laser Air pump selection suggestion Recommended to choose air pump of â?¥30L min and the outer diameter of the air pump interface is around 8mm FeaturesOfficial SCULPFUN S9 Air AssistThis is a standard S9 air assist nozzle designed by SCULPFUN it is an all metal structure and fits perfectly with the S9 laser You only need a few minutes to install it High speed Air Assist NozzleLike the S10 nozzle it is a high speed air assist nozzle with an advanced fluid mechanics design Only a 30L min air pump can achieve a high speed airflow of 13 5m s Faster and Cleaner CuttingS9 air assist will greatly improve the cutting ability of the S9 laser With air assist S9 cuts plywood and MDF boards 2 3 times faster and cutting surfaces are cleaner and have no smoky Excellent Air S