No. 21 Fully Upholstered Seat



  • No. 21 Seat is available in a serpentine spring support component or with an ergonomic substrate and formed poly cushion
  • Foundation is injection molded, glass-filled polypropylene which is especially strong but not brittle and upholstered to match the seat cushion for an attractive two-piece fully upholstered seat
  • No. 21 Seat passes the 600 lb. static load test and surpasses 300,000 cycles without failure in the ASTM-851-87 Test Method for Self-Rising Seat Mechanisms
  • The cover utilizes drawstring construction for an unwrinkled appearance and ease of replacement
  • Unique cam-driven seat hinge mechanism for consistent, maintenance-free operation
  • Seat pivot is covered to prevent tampering


  • Available on the Nos. 4, 8 & 12 chair platforms


  • Available in full fold, 3/4 fold (standard) or 1/2 fold options
  • The serpentine spring version is available with a Loge-style cushion
  • Standard seat number plates are available for use with this seat
  • Available with a veneer-surfaced wood panel attached with concealed fasteners


LP1 and LP2 Bronze Plates

LP5 & LP6 Aluminum Plates

Available for the following platforms