The Planet Waves 1XVP4-5 is a 5-pack of assorted guitar picks, medium gauge. Guitar picks come in a variety of materials, shapes, and thicknesses. Nylon has a warm/vintage tone, Celluloid provides a warm/rounded tone, Duralin brings a brighter sound, Black ice (also duralin) is jazz shaped for articulate players, and Cortex provides a bright tone with a strong attack