Speak-Thrus made of brass
549
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Speak-Thrus are designed to allow audible transmission of voice requests at ticket windows
- No-Draft Speak-Thrus are designed to allow audible transmission of voice requests at ticket windows, box offices and more. They prevent tampering from the outside, and stop drafts to the interior. The 549 Series is made of brass. Each unit is individually boxed with gaskets and mounting screws for installation on glass up to 1/4 inch (6.4 millimeter) thick. The Speak-Thrus require a minimum hole diameter of 2-1/4 inch (57 millimeters), and will cover holes up to 4-1/4 inch (108 millimeters). Recommended hole diameter is 3-1/2 inches (89 millimeters)
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