There are a variety of 20-pac designs:

EE480CL is permanent 20-pac that comes standard in all Traditional DS and SS storage racks. This is the heaviest most durable 20-pac available.

EE48CLR pac clips into racks, carts and cases and is easily removable for movement around the datacenter.

EE48CLH features the same basic design as the E480CL but has flanges and a retractable aluminum handle. The flange design accommodates a rack slot label. This pac is standard in all cases.

EE4CLRH is the same flexible locking clip design as our E480CLR but with the addition of a retractable aluminum handle. This pac is standard in the OSC360 and OSC480 off-site storage carts.