This is placed on the walls of the room between classified area & non-classified area. It is used for transferring o material from or into the clean room without troubling its environment. This supports in averting contagion of Clean Room Pass Box, without having to open the room door thereby using interlocking of aluminum glass windows of Clean Room Pass Box. This has flexibility to suit end user requirement and capability to operate without noise and vibration. It is available in Mid Steel Sheets, Galvanized Sheets and Stainless Steels and also fabricated in Commercial Block Board with Laminates.Size: 18" x 18" x 18", 24" x 24" x 24", 36" x 36" x 24", 48" x 48" x 24"