friction hinges Suitable for UPVC/Aluminum windows and doors. To limit the opening angle of windows Sizes: 10'' / 12'' Wind Supporter, friction hinge, PWS hinge, window hinge, door hinge, aluminum alloy hinge, zinc alloy hinge for UPVC / Aluminum windows and doors.Features: Durable , applied and secureFirst-choice environmental protecting quality forarchitectural construction in China.China top ...