Moldex SparkPlugs disposable ear plugs utilize a tapered design for easy insertion in any size ear canal. They are made with non-irritating, smooth surface for added comfort. Moldex SparkPlugs come with several fun colors in each package. NRR 33db. ANSI S3.19-1974Includes PlugStation dispenser that offers a clicking mechanism for easier use and dispensing. The chute delivers plugs right into the palm of your hand. Eliminates the mess of individual paper/polybag packaging. Each dispenser is sealed and disposable plus completely recyclable. Mounting bracket with hardware included with every PlugStation