This is a Bryant/Hubbell 100 amp 3 wire 4 pole pin and sleeve style receptacle complete with BB100N mounting box.  Box comes with 1 1/2" weatherproof hub.  Check our feedback and buy with confidence.  We have been in business for 30+ years.  As with all of our listings, your satisfaction is guaranteed.   We can ship same day ups if the order is received before 3:00 pm central.  Check our store for more fittings or contact us for items not listed.