Vacuum glazing solutions Vacuum Glazing Solutions HaanGlas BASIC Minimum 3 0 15V 3mm No Evacuation holes design Fully toughened VIG Glass Solder Edge Sealing Maximum size 1600 3000mm 0 5 w M2 K thermal transmission 36Dbs high soundproof Variety shapes available Lami VIG IGU available Flexible production fast delivery 25 cheaper price No expansion and contraction 25 years super long life