This is an Appleton EYF50  1/2″ explosion proof seal off.  It is factory new.   Call if you need a bigger quantity.  It is equal to Crouse Hinds EYS11.   I also have most other sizes in my store.  Check my feedback and buy with confidence.  We have been in business for 20+ years.  As with all my listings, your satisfaction is guaranteed.  I can ship same day ups if the order is received before 3:30 pm central.  Check my store for more fittings or contact me for items not listed.