Jackson Earmuff - Cap Mounted Model HP-22-MB (Shown with hard hat - NOT INCLUDED) For use with universal slot safety caps Fully dielectric NRR: 22 Cap sold separately Warning These hearing protection products help prevent hearing loss against certain noises. To provide proper protection, the hearing protector should be (1) suitable for the job, (2) fitted properly in/on the ear, (3) worn during all times of exposure to noise, and (4) replaced when damaged or otherwise necessary. Failure to fit and use hearing protectors according to these instructions will reduce their effectiveness. Failure to wear hearing protectors 100% of the time that you are exposed to hazardous noise may dramatically increase your risk of developing hearing loss. Free standard ground shipping within continental U.S. Availability: Usually ships the next business day. 0748-0022$31.96 What does the NRR number mean? (Requires Adobe Acrobat Reader)What does the NRR number mean? Jackson Hard Hat - SC6 Type IJackson Hard Hat - SC6 Type I Availability: Usually ships the next business day. JACSC6$12.86 Color: whiteredbluegreenyelloworange All prices shown are in U.S. Dollars The Cyberweld® name, logo and the slogan "Weld with your mouse"® are registered service marks of: J.W. Goodliffe & Son, Inc. 1900 E. Elizabeth Ave. P.O. Box 4370 Linden, NJ 07036 (800) 419-0580 FAX (908) 486-9366 Phone answered live M-F 8:00am to 4:30pm EDT © 2000 - 2008. All rights reserved.