The Samsung range surface element knob (DG94-01400A) is a genuine replacement part for your Samsung 5.8 cu. ft. Electric Flex Duo Slide-In Smart Range. Over time, knobs can wear out or become damaged from daily use, making it difficult to control the heat of your stove's surface elements. Replacing this knob is straightforward; simply pull the old knob straight off its post and place the new one in its position. Before purchasing, check your range's model number for compatibility to ensure this knob matches your appliance.