Five inch diameter cast stainless steel thru with vertical louvers provides natural voice transmission. Gaffco Model GS-14 Talk Thru is available for interior or exterior use (specify which) and fits glazing from 1/4" to 1 7/8" thick. Optional security screws and contraband screen are available.
Please indicate glass thickness when ordering talk thru.

Requires 4" diameter hole.

Class III bullet resistant.