Leviton TBR20-W 20-Amp, 125-Volt, NEMA 5-20R, 2P, 3W, Tamper-Resistant, Duplex Receptacle, Commercial Grade, Self Grounding, White Mechanical shutter mechanism prevents access to contacts unless a two-pronged plug is inserted, helping ensure that foreign objects will be locked out TR symbol on receptacle face assures they meet the 2008 NEC Section 406.11 code requirements Die-cast bushing for additional assembly security Base and face made of high impact thermoplastic Convenient washer-type break-off plaster ears for best flush alignment