What are these called???

[rocketjockey]

Im talking about the rack that you put your frag plugs in.

 

[subielover]

Egg crate, a.k.a. light diffusers.

 

[coral head]

You can by 2' by 4' of it at Lowes or Home Depot.

 

[coraljunkie]

It is actually called light diffusers.