Specification: Color: Blue Material: ABS Overall Size: 20 x 13.5 x 0.6 cm / 7.87 x 5.31 x 0.24 inch (slot size shown in the picture)   Features: • Excellent tool in education and DIY project. • Access to all consumer ports: TF card, HDMI and USB cable. • For Raspberry Pi, Uno R3, Mega 2560, 400 & 830 Points Breadboard. • Portable, easy to move and carry, can be stably fixed on the desktop to meet your needs.   Warm Tip: We use the M2.5 screws to allow the customer to better assemble the motherboard; the raspberry pi board is more suitable for the M2.5 screws (the Mega2560 board can not be screwed).   Package Included: 1 x RAB Holder 1 x Screwdriver 8 x Screws (The Raspberry Pi motherboard, UNO R3 motherboard, Mega 2560 Motherboard, the breadboard are all NOT included.)   Instruction is not included. Any questions, please contact us immediately for solution. Hope a nice day!