Lots of options, and a unique lumbar support shell set this chair apart from other low price plastic chairs. The basic armless chair comes with legs or sled base. You can have arms, pads, castors, ganging, stool height, and they stack for storage.
Description from their site:
+ Injection-molded recyclable polypropylene shell and polycarbonate arms in 15 standard opaque and translucent resins (color match shell option).
+ Powder-coated or chrome-plated steel frame.
+ Arm and armless versions.
+ 4-leg base available with glides or casters; sled base offers ganging option.
+ Upholstery – lumbar cushion; seat and lumbar cushion.
+ Stackable counter height and bar height stools available.