... impact and pressure ,improve the impacting capability of the insulation layer.Besides,with easy in application and simple quality control. ... Ordinary spec: 1.Mesh size:4x4mm, 4x5mm,5x5mm,6x6mm,10x10mm,2.85x2.85mm,20x10mesh ... ,blue, green, orange,red,yellow etc.6.package: shrink film for each roll,then 4rolls/carton.. alkali-resistant fiber glass mesh for wall