Kit includes spacer, anchor pack and conduit block setIncluded with STI-1210D and STI-1221DOpen back box spacer with conduit knockouts for mounting around exposed conduitReplacement back box for STI-1210D and STI-1221D
CompareSTI-1210DHorn/Strobe Damage Stopper® and Open Back Box with Conduit KnockoutColors: Dimensions:8.5 in H x 6.5 in W x 5.75 in DView Details
CompareSTI-1221DStrobe Damage Stopper® and Open Back Box with Conduit KnockoutColors: Dimensions:8.5 in H x 6.5 in W x 5.75 in DView Details
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