3M PELTOR Ear Muffs, Noise Protection, Cap Style Hard Hat Attachment, NRR 25 dB, Construction, Manufacturing, Maintenance, Automotive, Woodworking, Heavy Engineering, Mining, X4P3E, Black/Chartreuse: Safety Ear Muffs: Amazon.com: Tools & Home Improvement
Protective Industrial Dynamic Buffalo Full Brim Hard Hat Mount Passive Ear Muff NRR 26
Klein Tools 60502 Earmuffs, Full Brim Hard Hat Attachment, 26dB Noise Protection, for Construction, Manufacturing, Maintenance, Woodworking - Amazon.com
Peltor™ H10P3E Hard Hat Ear Muffs - 27 dB - Black/Red - ABS
Honeywell Howard Leight 1035200-Vs Hard Hat Mounted Electronic Ear Muffs, 23 - Walmart.com