... internal opening window. One set include: top, middle and bottom. PWS Hinges, 90320445 Down -- corner hinge for very good U-PVC window ... Material: Zn alloy / SteelFinishing: Electroplated.Except hinges, we also produce door handles, window handles, locks, sliding wheels, espagnolette bolts, accessories, ... seals and Electric tools, etc. Welcome to enquiry. Corner Hinge, 90320445, hinge, door hinge