Leviton 21254-E 20 Amp, 125 Volt, Industrial Series Extra Heavy Duty Grade, 4-In-1 Receptacle, Straight Blade, Grounding, Black Interlocking Thermoplastic Nylon Cover and Body Universal Mounting Available Hospital, Surge, and IG Versions Available 15-20 Amp Duplex Configurations Available Extra Heavy-Duty, T-type triple-wipe bronze contacts for maximum performance