SparkPlugs Ear Plug Dispenser, PlugStation, Uncorded, Bullet Shape, NRR 33 dB, 250 PairsMfr #: 6644 SparkPlugStation with SparkPlugStation with SparkPlug, 250 PR. With the PlugStation, you can afford to put earplugs everywhere they need to be. Hang one near work stations, one outside the bathrooms, and one in the break room. Easy and comfortable access to hearing protection will help ensure earplugs are being used and save time. Plus, every PlugStation comes with a free stand. SparkPlugs earplugs are made from extra soft, extra light