A:Answer The LG - SideKick 1.0 Cu. Ft. 6-Cycle High-Efficiency Pedestal Washer - Graphite Steel, Model # WD200CV has a width of 29" and is designed for compatibility with LG Front Load Washers that have a width of 29". It will not work with the LG Front Load Washer / Dryer Combo, Model # WM3997HWA which has a width of 27". The LG 1.0 cu. ft. LG SideKick™ Pedestal Washer, LG TWINWash™ Compatible, Model # WD100CW has a width of 27" and is designed for compatibility with select LG Front Load Washers that have a width of 27" and will be compatible with the WM3997HWA...^IFV