Tontec Acrylic Transparent Base Plate Terminal Optimizer Breadboard Compatible for Arduino UNO R3 Make your UNO R3 well fixed on base plate when you get all screws on. It's transparent and made of sturdy durable material. Simply installation.Good choice for spiffing up your Arduino UNO. Package includes a base plate for Arduino UNO R3 terminal optimizer breadboard along with mounting screws and nuts. Lifetime Hassle-free Warranty.Please don't hesitate to contact us whenever you are confronted with problems.