This list include the case for the latest 4 Model B and the case for 3 Model + The Case is made of Aluminum Alloy with CNC machining manufacturing technology. Its and good-looking are liked by makers It includes the dual fan and thermal tapes which reduce the temperature for board There are four screws to fix the case with board, pls follow the installation instruction. Compatible With: 4 Accessory Type: Cases Dual Fan: Low Power Consumption Design. Very Quiet Cooling Fan, You Can Hear Even . Update Thermal Tape Can Make Sure Heat Conduction Effect. For Aluminium Alloy Case and Heatsink: Perfect Size for 4 3B 3B+ Big Size Heatsink and Cooling Fan Can Make Sure: No More Overheating Problem. High Quality CNC Aluminium Alloy Case Can Protect your Pi Safe. Open Design Can Make Sure Our CNC Case will not effect Wifi Signal. Colour: Black Material: aluminum alloy casing Package Contents: 1 * radiator 1 * set of mounting screws Only the above package content, other are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.