SY1 Equivalent to STA-1, SCY1R, 58A.Fits Security, Brinks, First Watch, Honeywell, King, King Star, Kumahira, Saga, Sisco and Star. Compare
SY4 Equivalent to STA-1D, SCY1, 58D.Fits Security, Brinks, First Watch, Honeywell, King, King Star, Kumahira, Saga, Sisco and Star. Compare
SY5 Fits Security, Brinks, First Watch, Honeywell, King, King Star, Kumahira, Saga, Sisco and Star. Compare
SY8 Fits Security, Brinks, First Watch, Honeywell, King, King Star, Kumahira, Saga, Sisco and Star. Compare