L14-30R TWIST LOCK WALL MOUNT RECEPTACLES - 3 POLE 4 WIRE 30A 125/250VTwist Lock Wall Mount Receptacles 3 Pole 4 Wire 30A 125 250V features include: Flush mount design Rugged Phenolic cover with PBT(Polybutylene Terephthalate) base construction resists impact, abrasion, sunlight & chemicals All contacts are solid one piece Brass for superior conductivity and reduced heat rise Heavy duty power contacts set in deep pockets to resist damage Heavy duty Brass combo head terminal screws Includes grounding screw cULus Listed