This is a single Leviton 70730-FIG locking receptacle. It is NEMA L7-30R, 2-pole, 3-wire, isolated ground, 30A 277V AC. Isolated ground devices have a grounding terminal that is electronically isolated from the strap to eliminate electrical interference (noise) in grounding networks that can cause problems in modern electronics. These are bulk packed loose with not outer box, so they may have some minor dings.
Most orders ship same day if received by 2:00 pm EST Mon-Fri and 12:00 pm EST Sat. Some larger orders or items that require special handling may be shipped next business day.