Galvanized triangular hardware makes this one of our sturdiest swing seats, It is made with 70 EPDM rubber with insert to resist vandalism, EPDM: Ethylene-propylene-diene-monomer which is a synthetic rubber material which helps prevent crazing, cracking and oxidizing, It measures 6"" x 24"" x 5/16"" thick, Grade: Commerical, Color: Red, The seats insert has bent edges to prevent injuries from sharp edges and then encased in EPDM rubber, The seat should last 2 years in harsh conditions and up to 5 years in optimal conditions, Some conditions may require replacement sooner, SKU: JNSNSP217