OULAI handles for alu window are popular products.The materials are aluminum or customized. Variety colors for you to choose, white, black,gold or customized( RAL Color Standard).The Production Processes are 1.Mould,2.Forging,3. Die-casting,4. Acid washing,5.Processing, 6. Polishing, 7.Lacquer/powder/coating/painting/anodizing. Welcome to consult.