Our sight glass is used to raise the efficiency of blocking sounds outside in an acoustic control room, a studio, a recording room, etc., and if used with a soundproof door, this glass provides its beautiful appearance. Sound Blocking : 30 ~ 40 dB Materials : ST.L - 2.3t, AL - 3.0 t Dimension : Special - sized doors and custom-built constructions available Excellent construction efficiency and sound blocking due to a single frame construction Solves frame and projected problems Studio, Recording Room, Acoustic Control Room, Projection Booth, etc Sound Blocking : 30 ~ 40 dB Materials : ST.L - 2.3t, AL - 3.0 t Dimension : Special - sized doors and custom-built constructions available Suitable for the places requiring a high - leveled sound blocking effect from the outside Solves frame and projected problems due to a concealed - type Broadcasting Room, Studio, Recording Room, Acoustic Control Room, Projection Booth, Plant ,etc.