This is an EFC brand AX250 expansion fitting for 2-1/2" rigid conduit.  It has 4 inches of internal movement. This is equal to an Appleton XJ250-4 and similar to a Crouse Hinds XJ74.  I also have bonding jumpers available.
   I also have most other sizes in my store.  Check my feedback and buy with confidence.  We have been in business for 30+ years.  As with all my listings, your satisfaction is guaranteed.  I can ship same day ups if the order is received before 3:00 pm central.  Check my store for more fittings or contact me for items not listed.