E-A-R PD-01-009 Classic One Touch Ear Plug Refills (500)- you get 4

Reduces noise levels up to 28 dB (uncorded) and 29 dB (corded) Soft energy absorbing foam provides a low equilibrium pressure making it one of 3M's most comfortable earplugs Moisture resistant making them less likely to swell through moisture absorption Proprietary slow recovery polymer foam helps achieve good acoustic properties Cylindrical shape helps fit most ear canal sizes for reliable seal Exposed cell surface texture resists movement in the ear canal thus minimising the need to often re-fit the earplug The uncorded version is also available in the 3M E-A-R One-Touch Pro Earplug Dispenser format Suggested Applications Use to reduce noise levels at work or during leisure time Suitable for use in many applications like wood working, metal fabrication and industry, heavy manufacturing, automotive and general manufacturing