Moldex Plugstation 7825 – 250 pair Spark Plug dispenser. This is one of the most cost effect solutions to noise at work, designed to place protection at the fingertips of the workforce in the workplace. Moldex SparkPlugs® ear plugs are made of extra-soft, extra light foam. Their tapered shape fits easily in the ear canal, and seals gently and snugly without pressure. They’re so comfortable you’ll forget you’re wearing ear plugs and offer a high NRR 33, making them suitable for most noisy environments. So, while they look like fun, they provide serious protection.