... the heat exchange and also reduces noise levels. The aluminum spacer is filled with silica desiccant pellets to ensure removal of ... . Size:350x180mmGlass Thickness:3-19mm (1/8" - 3/4")Aluminum Spacer Width:6,9,12,14,15,16mm (1/4", 11 ... /32", 1/2", 9/16", 19/32", 5/8")Spacer Fill: Dry Air, Argon