The quick stacking door has many functions such as heat preservation and cold preservation, insect and wind prevention, dust insulation and sound insulation. Widely used in underground parking lots, industrial plants, food, textiles, electronics, printing and packaging, automotive assembly, precision machinery, logistics and warehousing and other places. Automatic Stacking Doors,High Speed Security Door,Rapid Stacking Folding Door,Automatic Stacking PVC Door Shenzhen Hongfa Automatic Door Co., Ltd. , https://www.hfgaragedoor.com Name of product specification Materials Steel factory / origin Price (yuan/ton) Than yesterday Compared to last week Than last month I-beam 25# Q235 Lai Gang 3830 0 0 0 I-beam 25# Q235 Angang 3900 0 0 0 I-beam 28-32# Q235 Angang 3950 0 0 0 Channel steel 8# Q235 Liu Gang 3650 0 0 0 Channel steel 16# Q235 Liu Gang 3780 0 0 0 Angle Steel 5# Q235 Tong Gang 3750 0 0 0 Angle Steel 12# Q235 Ma Gang 3820 0 0 0