3M 340-4002 Corded Earplugs (NRR25) E-A-R™ UltraFit™ Earplugs with Case

Corded Earplugs 3M 340-4002 (NRR25) E-A-R™ UltraFit™ Earplugs with Case
Designed for comfort and effective hearing protection, these earplugs feature a pre-molded triple-flange design, meaning users do not need to roll down the earplugs before inserting. Simply hold the stem and push it into the ear canal, making the fitting process quick, hygienic, and easy, even with dirty hands or while wearing gloves. Made from a soft, flexible elastomeric polymer, it conforms comfortably and securely to most ear canals, reducing internal pressure and allowing for extended wear. The 340-4002 earplugs have a Noise Reduction Rating (NRR) of 25 dB, which is ideal for moderate to high noise environments. Being reusable, they can be washed with mild soap and water for hygiene and waste reduction. The earplugs come with a blue vinyl cord to prevent loss, and notably, include a carrying case that keeps the earplugs clean and readily accessible for repeated use.

Features
- Noise Reduction Rating (NRR) 25 dB: Reduces hazardous noise levels by 25 dB in accordance with ANSI S3.19-1974 standards
- Premolded, triple-flange design: Allows for easy, fast, and hygienic insertion without the need to roll down before inserting.
- Soft polymer material: Provides maximum comfort, adapts to a variety of ear canal sizes, and can be worn for extended periods
- Push-to-Fit style: Simply hold the stem and push into the ear canal without touching the tip, helping maintain cleanliness
- Corded: The blue vinyl cord helps prevent loss and makes it convenient to hang around the neck when temporarily not in use
- Comes with carrying case: Keeps earplugs clean, protects against damage, and allows convenient portability
- Reusable and washable: Reduces waste and frequent replacement costs
- One size fits most: The flexible design accommodates a wide variety of ear canal sizes
- Electrically insulated / Dielectric: Safe for use in electrical environments (some sources indicate Dielectric or Electrically Insulated)

Applications
- Assembly and mechanical work: Areas with machinery noise
- Construction: Protects against noise from tools or machinery
- Maintenance work: Such as general repair and maintenance
- Polishing, grinding, cutting: With high noise from tool usage
- Machine room work: or areas with continuous high noise levels
- Automotive industry: high-noise manufacturing or assembly areas
- General manufacturing industries: With ambient noise
- General noisy activities: Such as using lawnmowers, household power tools