back, seat and arms constructed from pressure die-cast aluminum : backs and seats have a polyester powdercoate that blocks Ultraviolet rays, are suitable for indoors and outdoors : legs are extruded aluminum sections and have nylon glides : legs offered in polished aluminum and silver- colored powdercoate : chairs stack 4 high and have stacking protectors under seat pans : backs and seats are offered in ten colorways : custom colors available, special quantities may apply—contact factory