?70pcs-35pairs?3M 312-1250 Noise Canceling Earplugs Sleep Noise Insulation Learning Industrial Product name: 3M 312-1250 noise canceling bullet earplugs Noise reduction value: SNR=36dB NNR=33dB Features: longer rebound time, softer Material: Foam Size: 0.47 inches * 0.94 inches (2pcs/pairs) Usage range Noisy environment Suggested Use: Replace once every 1-3 days depending on the frequency of use. Product Reminder! 3M Noise Protection Earplugs reminds you that it is recommended that you change your earplugs every 1-3 days, depending on the frequency of use. If the cold temperatures at your delivery location cause the 3M earplugs to become hard, place the earplugs in a warm room to allow them to warm up, or use the warmth of your hands to make them soft again. Once the product is soft, you can wear it normally The above two packages are 3M312-1250 earplugs genuine! Shipping Fast Shipping Worldwide Returns We accept returns 30 days from the package received. Payments All payments are accepted via PayPal. Feedbacks The product came very well packaged. I'm very happy. thank you for everything. Seller strongly recommended. This is great! I recommend! The product looks amazing. Delivery was fast. Excellent seller, great communication. I advise everyone.