This product is protective case of SainSmart Mega2560 R3, fastened by eight screws. It is made by high grade acryl, which provides excellent protection, with fashion appearance. This is unique design for Mega2560 R3 with pin lekage, which provides easy connection to other components.The dimension of sainsmart Mega2560 R3 is the same as original Arduino Mega2560 R3.