Lets discuss how to service your Para Tether Earplugs. First, your simply press the ear plug replacement onto your existing tether. Than enjoy years of prolonged quiet and comfortable service life. Finally, its just that simple. Inspecting your earplugs periodically is an important part of maintaining maximum plug performance. Exceptional sealing to the ear canal allows a noise reduction rating of NRR 26 DB, perfect for construction work and contracting. These soft silicone earplugs are hypoallergenic and comfortable to wear all day. A complimentary storage case is included to keep your buds clean on the job. If you have any problems with your ear plug replacement, contact us at: firstname.lastname@example.org. Check out some of our other products on Etsy.