3M E A R Classic 310 1001 Ear Plugs, Cylinder, 29 dB NRR, Uncorded, Disposable, Yellow, 200 PK 797DY2 Standards CSA Certified C22 Standards CSA Certified C22 Shackle Type Standard Shackle Vertical Shackle Clearance 1 1 8 in Horizontal Shackle Clearance 3 4 in Shackle Diameter 3 8 in Shackle Material Boron Alloy Shackle Finish Chrome Plated Lock Body Color Silver Body Height 2 in Body Thickness 3 4 in Body Width 2 in Lock Body Material Steel Lock Body Finish Chrome Plated Number of Pins 5 Pin Number of Keys 2 Rekeyable Yes Features Aptc12 Cylinder Helps Prevent Picking Resistance Properties Corrosion Resistant Compatible Key Manufacturer Part Number AK5 Environment Indoor and Outdoor Country of Origin Taiwan Noise Reduction Rating 29 dB Earplug Packaging Bulk Box