Honeywell SSM24-6 Alarm bell, 24 VDC, polarized, 82 dBA, 6"

Approved for indoor or outdoor (with WBB backbox) use.Low current draw.High dB output.Three sizes available: 6" (15.24 cm), 8" (20.32 cm), and 10" (25.40 cm) diameter.24 VDC models; polarized for use with supervision circuitry.Bells mount directly to standard 4" (10.16 cm) square electrical box.