Kobe 12" Duct Cover for the CH0342SQB, CH0142SQB, CH0042SQB Range Hoods This duct cover is required in order to make the following 42" Range Hoods by Kobe Wall Mounted: CH0342SQB, CH0142SQB, CH0042SQB. Overall Dimensions: 42" x 12" x 12" Without this duct cover the following range hoods cannot be wall mounted: CH0342SQB, CH0142SQB, CH0042SQB.