3M X5P3E Peltor Black Model X5P3E/37279(AAD) Cap Mount Hearing Conservation Earmuffs, English, 14.573 fl. oz, Plastic, 4.6" x 8.2" x 6.7": Amazon.com: Tools & Home Improvement
ANSI Ventilated Climbing Hard Hat Kit with Mountable Earmuffs – Technopack Corporation
3M PELTOR Ear Muffs, Noise Protection, Hard Hat Attachment, NRR 25 dB, Construction, Manufacturing, Maintenance, Automotive, Woodworking, Heavy Engineering, Mining, X3P3E,Black/Red: Safety Ear Muffs: Amazon.com: Tools & Home Improvement