More like 1U CPU Copper heat sinks with fans, Power supplies, slim line CD's, Adapters for CD's, internal cooling fans, and such.

I take blank cases and modify them and fit all the components into the case then load the operating system on to the server as ready to go out of the box.

I make them up pretty much to order or stock items to sell at a later time.

My Beagle World site is running on one of my smaller built servers. That has a 1.2 Ghz AMD, 160 Gig HDD, Slimline CD, Air Filter, 2 NIC's, and a 1 Gig of Ram installed running Blue Quartz CentOS Linux.