4.Hardware
(1) SUS304 stainless steel torsional spring: unique design, accurate combination between profile and hardware,
reasonable opening strength, SUS304 stainless steel material to make sure no rust and longer lifetime period.
(2) Applying superior hydraulic damping to assure steady and smooth retraction of window screens
(3) Wind resistant card: unique PVC card design, which perfectly solve the matters on blowing off of window screens,
level-12 wind test has been approved by professional inspection institute
(4) Mesh aperture: 18×16, 20×20, 26×26