Bold and refined design makes the Alphabet chair a sophisticated choice for the classroom. The AB-AS4L12 Alphabet Series Four Leg Chair features a seat height of 12" and the shell is one-piece structurally engineered injection-molded polypropylene mixed with polyethylene with 10% glass fill. Dual triangular internal support channels eliminate the need for any external surface support ribs or exposed tubing. Shell construction yields an extremely durable yet flexible shell with a clean and pleasing aesthetic. Patented shell geometry and design yields an extremely comfortable and ergonomic seat surface. Carrying handle is centered for best weight distribution and ease of use. 4-leg frame is constructed of 16-gauge U-channel support brackets for superior strength and durability. The frame support brackets attach to the seat shell using six T-30 special wave-lock threaded screws for superior load bearing capacity, higher shear strength and better frame to shell retention. Rated for use up to 300 lbs. 4-leg chairs are standard with SOLO swivel glides with tool removable surface caps that can be easily changed in the field. SOLO glides are available in nylon, steel or non-skid caps to accommodate a variety of floor types.