These Kill 6727 chairs, the so-called Bird or Tulip chairs, are the hard-to-find version of an office chair with height adjustment. The blue leather of the chairs is in excellent condition with a beautiful patina and minimal signs of wear. Only one chair shows a scratch on the corner of one armrest. The chrome frames with smooth-running casters barely show signs of aging. The hydraulic height adjustment works perfectly on all chairs and allows a seat height of 43 - 51 cm. These chairs can also be equipped with glides instead of casters and can also be used as dining chairs.