1.Independent research technology with beautiful appearance and super capability
2.the capability of wind-resist:3500 Pa
gas-dense index: 0.5-1.0m3/mh
water-dense index: 400Pa
3.to select of double glazing window: 5+6A+5,5+9A+5
4.to choose inner hung screen when using rock rods
5.to select of slippery and inlaid hinge for outside opening
6.European Standard hardware or PVC fittings
7.thickness of forced stick: 1.4mm,materials for doors: 2.0mm、1.8mm