Contains 10 Clear Reds, 10 Clear Oranges, 10 Clear Yellows, 10 Clear Greens, 10 Clear Blues, 10 Clear Whites, 10 Clear Pinks and 10 Clear Violets.These light-emitting diodes work well for a wide variety of applications including Arduino projects.Comes with more-than-enough 200ohm resistors for connections.Forward Voltages are Clear Red, Orange and Yellow 1.9-2.0V, Clear Green: 2.9-3.1V, Clear Blue, White, Pink and Violet: 3.0-3.2V. Packaged in a resealable zip lock bag for your ease of use.