If you are looking for an economical stool with a stylish outlook, the Boss black stool is exactly what you need. The seat and back are made of black polypropylene, which gives the stool superior durability and lumbar support. The stool has a solid chrome frame and the sculpted seat back has an opening integrated into it for enhanced ease with mobility. These stools can be stacked, up to five high, for space-saving and storage. Ganging clamps are also available (Boss B1400GC, sold separately) so that multiple units can be attached at the bottom of the leg.