Material: Stainless steel 304/301/202 Width of the bottom bar: 13.5 or 18.5mm Thickness of the four bars: ... 2.0mm/2.5mm/3.0mm 90540121Two-bar friction hinge/wind supporter for U-PVC window and door ... , Reliable supplier, Competitive price, Warm service, Prompt delivery. friction stay, two bar , friction hinges