... metal pipe size:40*80*1.5mm elliptic steel pipe School furniture,Auditorium chair,school chair1) size: 52*90*78cm2) frame: ... plastic board, folding5) foot: cast steel6) welding: GMAW——gas metal arc welding7) pipe surface: degreasing, rustremoving, phosphating, electrostatic spurt ... . suitable for reporting hall, conference hall, multimedia classroom. Metal and wooden auditorium chair/school furniture