about this project Highest Noise Reduction (NRR 33): Disposable foam earplugs offer the highest noise reduction rating of any disposable earplugs on the market; they are also the most used PE foam earplugs in the world. Conforms To Inner Ear: The bell shape conforms to the contours of your inner ear to ensure maximum noise reduction and hearing protection; it also helps resist the tendency to back out of the ear canal. PROMOTES PROPER HYGIENE: Push-fit ear tips feature a smooth, stain-resistant closed-cell foam cover to help prevent dust buildup and improve overall ear safety. Long-term wearing comfort: soft polyurethane foam improves long-term wearing comfort and helps improve hearing safety in the workplace; Recommended Industries: Agriculture, Chemicals, Construction, Law Enforcement, Manufacturing, Military, Mining, Municipal, Oil & Gas, Pharmaceuticals, Steel, Metals, Transportation. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-Minnanxin