Features: Enhances your 3D printing experience with our USB 3D Printer Exhaust Fan set, to efficiently expel Smokes and purifies air without the need for a switcher. Featuring a fast speed fan with 4000RPM, operates on a 5V1A input and includes a 195cm USB cable and a 200cm exhaust duct, ensuring versatiled and effective ventilation. Mainly used for Smokes exhaust, ventilation, power supply with USB adapter, mobile power and so on. Perfectly for kitchens, bathrooms, factories, electronic repair shops, and even pet houses, providing reliabled air purification and ventilation. For 3D printers, kitchens, bathrooms, factories electronic maintenance, pet house and other general use. Specifications: Speed: 4000RPM Input: 5V1A USB cable length: about 195cm/76.77in Duct diameter: about 8.6cm/3.38in Duct length: about 200cm/78.74in Component: Plastic Enclosure Package Includes: 1Set Exhaust Fan note: Due to problem of lighting effect there might be tolerances in product, please understand. Please allow 0-2mm error due to manual measurement.