... number:SQ-5025Specification:Width: 44cm,back height:28cm, Depth:42cm.Blowing mould material:HDPE5502 Colour: blue,red,yellow,green,orange,gray ... indoor and outdoor stadium use2.Double Layers for the blowing seats.3.can be used at least 10 years.4.installation is ... of one layer:from 3mm to 4mmISO9001/ISO14001 approval hollow blowing mold stadium seat SQ-5025