Approx 6 mos old, and out of the house once; I bought a 4U and really need a 6U. If I get no takers, I'll go and get another 4U - racks are like hard drives - they'll fill up eventually This is the shallow depth case (14"); molded polypropylene & stackable. If you've got a 6-8U case you want to trade (shallow or not), send me a PM. $70 shipped CONUS, in original box. Paypal accepted. Will take / send pics on request.