Features: This cooling fan can be used for the Raspberry Pi 4 Model B/3B+/3B and Orange Pi shells (with fan holes) When the fan is working normally, the sound is very small. If you can'for t stand it, please think about it before placing an order. Precise installation positioning holes, matching with the Raspberry Pi 4 Model B/3B+/3B on size , fast heat dissipation. It solves the disadvantage that the fan cannot be used for heat dissipation at the same for time when using the display. Use the fan to dissipate heat while using the display to extend the life of the motherboard. Specifications: Item: Cooling Fan with Metal Holder Size: Mixed Use for: Raspberry Pi 4 Model B/3B+/3B Weight: approx 23g Note: Due to the problems of lighting effects and shooting angles, there will be certain tolerances in the product, please understand. Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid. Package includes: 1 PC x Cooling Fan (Not include the Raspberry Pi / LCD / for Case) 1 Set x Screws and Nuts 5PCS x Thermal Pads