Gikfun 5mm LED Light Assorted Kit DIY LEDs for Arduino (Pack of 100pcs) EK8437 Size: 5 mm Color: White Yellow Red Green Blue,each 20PCS Head Type: Round; Head Diameter: 5mm; Head Material: Plastic. Color: White Yellow Red Green Blue,each 20PCS. Durable &amp;Super bright, Low heat&amp;Energy-saving, Small size &amp;Long lifespan. Wide Application, suitable for DIY LED Projects, School Science Experiments, Car Decorations, Electronic and Electrical Experiments, Signal Indicator, including Arduino Projects,etc.