Founded in 1970 as Cleveland Earmold Laboratory, Great Lakes Earmold Laboratory makes custom earmolds and specialty earpieces for the hearing-care industry. The North Royalton company became independently owned in 1993 when longtime lab manager Jim Kuznar purchased it, and it remains family-owned with quick one-day turnarounds and a distinctive range of custom colors. Its work includes purpose-built protection such as shooters’ plugs and swim plugs alongside accessories and supplies for hearing-care professionals.