For higher sound control in meeting spaces, medical facilities, or religious institutions, this series takes sound attenuation to our highest level. High quality, with an FSTC of 41, the 4166-4188 series doors feature a perimeter seal, acoustic lining, and heavy-duty hardware. Available in two panel widths: 4166 is the dual 6” panel, and the 4188 incorporates the same pantograph geometry for ease of use with a larger 8” panel. Five contemporary vinyl laminate finishes are available.