The H100 Series Pass Thru Chamber (pass through) is mfg 3/4" novaply with high density plastic laminate and acrylic door. An optional reverse action interlock opens one door and locks the other side. Chrome-plated hinges. A custom designed unit for easy access or passage of materials between the cleanroom and outer dirtier areas. Essential for maximum protection against outer contamination when objects are passed into or out of the cleanroom. Constructed of novaply laminated plastic. The optional stainless steel mechanical interlock is a pushpin lock and turn handle system. Completely assembled and ready for installation.