National Public Seating Right removable tablet arm for 8200 stacker chair has frame shields to protect against snags and pinching and conveniently flips to make getting in and out of the chair easier. (Tablet arm is sold alone, chair not included). National Public Seating Right removable tablet arm for 8200 stacker chair has color injected polypropylene shell which makes scratches less visible. Arm has welded 7/8" square tubing frame and is made of injection molded polypropylene.