5 Piece Plastic Chairs, Stackable, Curved Design Seat and Back Optimize student’s comfort with an ergonomically contoured seat shell student chair with waterfall seat edge. Having comfortable seating in the classroom help students pay more attention to their teacher when not having to move around due to discomfort. The one-piece molded seat shell has a vented back to provide airflow not found on solid back classroom chairs. With a 17.5″ seat height you’ll cater to high school and adult education centers. These school stack chairs are built to last with a dual braced frame that can hold up to 880 pounds. School maintenance workers can appreciate student chairs that can stack for floor upkeep, these student desk chairs stack up to 20 chairs high. We consider this student stack chair to be the premier stack chair – essential for every school and classroom setting. Specifications: Multipurpose Stack Chair Chrome, Plastic, Polypropylene Stack Quantity: 20 Recommended for Middle School, High School and Adult Education Centers Ergonomically Contoured Black Plastic Seat Shell Vented Back allows air circulation Dry assisting drain holes Chrome Frame with non-marring plastic floor glides Limited Lifetime Warranty on Frame Ships Fully Assembled Sold as 1 Each. Plastic Stack Chairs. Seat Dimensions: 17.5″H x 17″W x 15.75″D. Meets or Exceeds ANSI/BIFMA Standards; Rated for Commercial Use. Stack Quantity: 20. Dry assisting drain holes. Color: Gray Plastic/Chrome Frame; Material: Chrome, Plastic, Polypropylene. Back Dimensions: 17″W x 16.5″H. Warranty: 3 Years Limited. Recommended for Middle School, High School and Adult Education Centers. Chrome Frame with non-marring plastic floor glides. Ergonomic Design – Contoured Shell Seat; Waterfall Seat. Rated for up to 880 lbs. Based on 6-8 Hours Use. Multipurpose Stack Chair. Ergonomically Contoured Black Plastic Seat Shell. Limited Lifetime Warranty on Frame. Overall Dimensions: 19.5″W x 23″D x 32″H. Care Instructions: SW-Solvent and water based cleaner such as foam. 880 lb. Weight Capacity. Vented Back allows air circulation. Ships Fully Assembled.