The (yellow )tip end of earplugs should be inserted only when ambient noise levels are not hazardous and the wearer wants hear-through,capability with instant protection from impulse noise(i.e.,weapons fire or explosive devices warning....)Noise reduction increases with sound level for impulsive noise such as weapons fire above 110 dB.Estimated attenuation ranges from approximately 0-22db.
The green tip end should be inserted when continuous hazardous noise is present and if it is determined that the attenuation reduces the hazardous noise to a safe as determined by a qualified professional. this green tip of earplug provides continuous noise to ambient noises such as aircraft, armored vehicles or machinery.

1. Payment: T/T, Paypal,Western Union available.
2. Lead time:10-15 working days for 1000~5000pairs, 15-20working days for >5000pairs.
3. Samples can be available within 2-3 working days.
4. Shipping freight is quoted under your requests.
5. Shipping port: Guangzhou, China mainland.
6. Discounts are offered based on order quantities.

Established in 2011,Guangzhou Aier Slow Rebound Foam Earplug Co., Ltd is a professional manufacturer with the factory & head office located in Guangzhou.Aier is specialized in developing ranges of earplugs. Main products include slow rebound memory foam ear tips, noise reduction earplugs.OEM is welcome.