Metal, Plastic SET OF 5 STACKING CHAIRS: Offers a comfortable and reliable seating solution that creates a welcoming atmosphere in lobbies, offices, professional cafeterias, training rooms, libraries, or business centers ERGONOMICALLY DESIGNED: Contoured seat features a waterfall edge that helps reduce pressure on your legs as you sit, and the curved back provides support to the thoracic area to optimize posture and comfort STURDY SLED BASE: Stabilizing sled base ensures that the legs won't snap, making this chair a great choice on carpeted floors, and plastic floor glides allow for easy movement around the venue DURABLE AND STYLISH: Chairs are constructed from heavy-duty polypropylene material to support up to 880 lbs. of static weight, and their sleek navy color adds style to any office or lobby NO ASSEMBLY REQUIRED: Each chair measures 19.5"W x 23.75"D x 32"H with no assembly required, and they stack up to 5 chairs high for compact storage after use