auditorium chair 1. COVER: HIGH QUALITY Fire resistant fabric 2. BACK & SEAT SHELL: PP (MIXED MULTIPLE ELEMENT) 3. FOAM: CASE-HARDENED DENSITY SPONGE 4. FRAME:CAST-IRON WITH POWDER COATED 5. MECHANISM: GRAVITY MOVEABLE ORGANIZATION,NON-MALFUNCTION AND DURABLENESS 6. BLAST SCREW FOR FIXING CHAIR:STAINLESS STEEL BULGE SCREW 7.Retractable Seat, Backrest with tablet or attached table on the backrest 8.material of attached table: high quality melamine board(fire proof;scratch resistant)