As a tabletop or wall-mount dispenser, the Leight Source 400 provides a user-friendly source for earplugs: simply twist the spout to release earplugs. Clearly displays fitting instructions for roll-down and no-roll foam earplugs. Holds (400) pairs of Howard Leight single-use earplugs. The Leight Source 500 provides a highly visible, user-friendly, permanent hearing protection center. Built with heavy-duty anodized aluminum and designed for wall installation, it dispenses earplugs with a simple turn of the handle. Holds (500) pairs of Howard Leight single-use earplugs. Both the 400 and 500 can be used with Matrix, Max, Max Lite, Laser Lite and Multi Max. The 500 can also be used with Quiet.