3M 1100子弹型耳塞NRR：29dB   SNR:31dB子弹型轮廊设计、降噪效果好表面经防污处理，佩戴卫生、安全包装：200付/盒，5盒/箱=1000付Soft, uncorded foam earplugs from 3M that conform to the unique shape of each ear for excellent hearing protection and comfort. 
• Smooth, dirt resistant surface for hygiene • Comfortable for a wide range of ear sizes • Includes a comfortable cloth cord for convenience • Can be combined with earmuffs for additional protection • Can be used with other personal protection equipment • Recommended for moderate noise (up to 100 dBA TWA). • Noise Reduction Rating (NRR)*: 29dB. 
*The NRR may overestimate the hearing protection provided during typical use. 3M recommends reducing the NRR by 50% for estimating the amount of noise reduction provided.
Leading the Advancement of Hearing Conservation™. 

3M ID: 70-0704-0630-4
GTIN(UPC/EAN): 5 00 51138 29008 0
Features and Benefits:
Tapered shape to fit the ear canal comfortablySoft foam seals the ear comfortablySmooth, dirt resistant surface for hygieneComfortable for a wide range of ear sizesHypo-allergenic materialBright orange color for visibilityCan be combined with ear muffs for additional protectionCan be used with other personal protection equipment 3M 1100子弹型耳塞产品图片