SmartSign 7 x 10 inch “Danger - Eye and Ear Protection Required in This Area” OSHA Sign, 55 mil HDPE Plastic, Red, Black and White: Amazon.com: Industrial & Scientific
Brady Part: 1136222 | Decibel Status Sign - CAUTION EAR PROTECTION REQUIRED 85 DB OR LESS NONE 85 DB OR MORE, Ear Plug Picto - Mounting Holes | BradyID.com