The CIS8/45 is a 2-gang, vandal resistant, hands free intercom station with a 2.5" , square frame, 45 Ohm loudspeaker that has a 2.35 oz. ceramic magnet and a moisture resistant cone. With a tamper resistant, heavy gauge, stainless steel faceplate and three (3) interwoven steel screens to protect the speaker, the CIS8/45 provides a very durable, high security call station for the most challenging applications. Tamper resistant, #6-32 x 1" , 'pin-in-torx' screws are included.