Leviton 8300 20-Amp, 125-Volt, Extra Heavy Duty Hospital Grade, Duplex Receptacle, Straight Blade, Self Grounding, Back and Side Wired, Brown Interlocking Thermoplastic Nylon Cover and Body Nickel- Plated Brass Strap with Integral Ground Contacts 15-20 Amp Duplex & Single Configurations Available Apron barrier to prevent accidental contact between terminal screw heads and metal box Exclusive V-shaped, serrated back-wiring clamps for superior contact