If you need to contain insects, then of your choices, aluminum is about the only way to go. Were you to use fiberglass or other lighter-weight synthetic screen products, crickets can chew right through it. With aluminum, it can wear on the nails of the chameleon, and at times induce injury, especially the larger the chameleon. For this reason, it is good to provide a secondary climbing grid of wood or plastic that the chameleon can utilize, in the hopes of minimizing the amount of screen climbing it would otherwise do. Good luck with all.