Satellites:PC 029832: FreeSpace 3 flush satellite tile bridge, packages of 6. This option is for use with tile ceiling installations to meet some local installation standards.PC 029853: FreeSpace 3 flush satellite rough-in pan, packages of 6. This option is for hard ceiling installations, as needed.PC 030097 FreeSpace 3 flush cosmetic covers; pair, blackPC 030098 FreeSpace 3 flush cosmetic covers; pair, whitePC 031145 FreeSpace 3 flush plenum kit packages of 6Acoustimass bass module:PC 029854 Tile bridge for bass module, packages of 6. This option is required for tile ceiling installations to meet some local installation standards.PC 029855 Rough-in pan for bass module, packages of 6. This option is required for hard ceiling installations.PC 029829 Surface-mount kit for bass module. Box of 1. WhitePC 029828 Surface-mount kit for bass module. Box of 1. BlackPC 030099 Pendant-mount kit, each contains a cable, eyebolts and a cosmetic cover. BlackPC 030100 Pendant-mount kit, each contains a cable, eyebolts and a cosmetic cover. WhitePC 031146 FS3B plenum kit for air handling spaces