Hochiki SI/CAP2(BLK) Black Base Sounder / Isolator Cover A protective cap which has been designed for the YBO-BSB2, but can also be fitted to the previous model (YBO-BSB) and the Base Sounder (YBO-BS) when either of these devices isn't fitted with a sensor. The cap is secured via a twist fit. The cap can also be added to the isolator base, YBN-R/3(SCI) to create a standalone isolator. Key Features: Protects wiring terminals on isolator bases and base sounders/beacons Easy twist-fit
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