Features:A cross rose can adjust the amount of oil.The machine is very quiet when in use.Made of high quality materials, durable and compact.This oil pump no need to distinguish positive and negative, it can free to connect.It is suitable for stage equipment such as fog machine and snow machine. Package Includes:1x 18w Oil Pump Specifications:Power: 18WVoltage: 220VProtection level: IP65Size: Approx. 6x4 cm/ 2.36x 1.57inch note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Our products are made with the splendid quality materials and are designed to provide you with the best possible user experience.