The HL400am dispensers for earplugs are designed to meet todays safety needs. The turn knob and catch tray are treated with an antimicrobial additive, making earplug dispensing more hygienic. The antimicrobial additive releases slowly to reduce the bioburden on the turn knob. This way the product remains clean and does not require extra cleaning, thus, driving cost savings. This product does not protect users or others against disease-causing organisms.