... 3.Chambers: 3, 4, 5, 6, 4.Thikness:2.5MM Plastic sliding windows/doors ; excellent quality;energy efficient&safety; acoustical ... insulation. 1. PVC profiles: 1>Brand: LG,Conch, Gudi, Gaoke, VEKA,etc. 2 ... Reinforcement: galvanized steel; thickness: 1.2mm, 1.5mm, 2.0mm, 2.5mm.5. Sealing strips: rubber sealing strip, black or ...