H20 Metal Detectable Reusable Earplugs Corded, Plastic, Blue, Corded ORS NASCO Black oxide spindle resists wear Black oxide spindle resists wear and tear while impeding rust Drop forged arm provides minimal flex under heavy work loads Swivel pad centers on work piece for a sturdy hold Sturdy tommy bar is engineered for durability and comfort [Nom] 4 1 2 in Grit 36 Hardness Grade S Hazmat NO Jan San Catalog NO Prop 65 YES Quantity 10 per carton Quarterly Flier NO Special Order NO Speed [Max] 13 comfort and reliable performance Features metal embedded in the earplug for easy detection Three soft flanges are designed to conform to ear canal Washable and reusable Provides protection