Round Chair (PRC-933) 1.    Chair surface : HDPE (Recyclable) 2.    Decorative design on chair top, cozy to sit on. 3.    Update new iron frame to load moreVertical loading test 190kgs pass, Horizontal loading test 77kgs pass, 4.     Offset loading test 150kgs pass 5.    Special material for floor pipe shroud, skid proof; low noise, waterproof 6.    pile up available , flexible to use 7.    Waterproof, High Toughness , Embrittlement resistant 8.    Good for Skid proof Mat, PU Track, etc 9.    It adapts to students from elementary to college. 10.Environmental (Pollution -Free) approved and made in Taiwan