quality plugs by rips metal detectable foam earplugs 100 pair - nrr 32db with detectable string - noise cancelling, sound blocking, disposable, corded earplugs bulk for food services, industry, pharmaceutical, pulp & paper is up for auction in Industrial & Scientific. The current bid is $1.00, 97% below the $37.95 MSRP, in New/Like New condition. This auction has ended — similar items appear in live auctions regularly.