four-section table circular switch for electric height adjustment hand switch for electric adjustment of height, back and sitting section table width 65 or 75 cm weight capacity 250 kgfour-section table circular switch for electric height adjustment hand switch for electric adjustment of height, back and sitting section table width 65 or 75 cm weight capacity 250 kgfour-section table circular switch for electric height adjustment hand switch for electric adjustment of height, back and sitting section table width 65 or 75 cm weight capacity 250 kg