Friedrich BAK baffle adaptor kit required for WallMaster series installation in existing Fedders B sleeve Baffle adapter Kit for WallMaster allows unit to be installed in sleeves deeper than 16 3/4 Adapts WallMaster for use in Fedders 'embody' sleeve Kit is complete with baffle and mounting hardware Extends WallMaster unit to 19 3/4deep Black color Baffle adapter kit for WallMaster allows unit to be installed in sleeves deeper than 16 3/4" Adapts Wallmaster for use in Fedders 'B' sleeve. Kit is complete with baffle and mounting hardware Extends Wallmaster unit to 19 3/4" deep Black color