Check the listing for details. 10pcs Quiet Cooling Fan heat sink for Raspberry Pi 4B 3B Plus Compute Module 4. Condition: New. Listed at 20.99 USD. 10pcs Quiet Cooling Fan heat sink for Raspberry Pi 4B/CM4/3B/3B+ This cooler features a quiet Cooling Fan with Thermal Conductive Adhesive attached to the top of CPU. Separate 2pin power port, flexible power connection position It is slim design,and it can be installed in the official Raspberry PI 3B+/4B case. Specification: Bearing Type: Sleeve Size (L*W*H):25*25*13.5mm(fan high 7mm,heat sink high 5mm) Connector: 2 Pin Rated Voltage: DC 3.0-5.8V Current: 0.08A Fan Speed: 7000RPM Noise Level: 18dba±10% Wire Length: 70mm Color: Black Voltage: Support 3.3v And 5v Fixing medium Thermal Conductive Adhesive: 180 degree peel force (PSTC-101 N/25mm): >15 Temperature resistance: 120 degrees Celsius Thermal conductivity ASTM D5470 W/ (m.k): 1.5 Item Included: Quiet Cooling Fan heat sink x10