VBL-24AP, Approved Red Bell 6" EN54-3 Cranford Controls Cranford Controls (a registered trademark) established since November 1993, is a leading independently owned company now located in Alton, Hampshire in the United Kingdom. Cranford Controls Website 309-024 AH-0218 Bell Datasheet v3.pdfDetailsDescriptionCanford Controls VBL-24AP 309-024 VBL series bell is designed for installation directly onto a wall, or by the use of any standard mounting box. Wiring to the bell is then completed via the easily accessible and clearly labelled terminal block. Securing of the keyed gong to the motor-drive unit is by use of a tamper resistant hex bolt. An Allen key is supplied with the bell for installation. Available with either a red or a grey gong, the VBL series bell is well suited to most applications such as fire alarm or class change signalling and compliments the Cranford Controls range of electronic sounders and fire alarm accessories.