Fire domes to fit Adastra metal quick-fit ceiling speakers. These steel back housings create a fire-resisting barrier to protect the speaker and ceiling cavity in case of fire. Fire regulations for certain buildings may require fire domes to be fitted to ceiling speakers to help prevent the possible spread of fire from floor to floor and maintain the fire alert sound system.,
,Connection apertures:2 x 22mmØ knock-out
Suspension/mounting aperture:10mmØ knock-out
,Connection apertures:2 x 22mmØ knock-out
Suspension/mounting aperture:10mmØ knock-out
