The middle door pulley bracket is made of metal, which is stable and durable; the roller part is made of high-strength engineering plastic, which has good wear resistance and stability. Features: Its unique design reduces friction and noise, resulting in a smoother and quieter user experience; Material: The hinge is made of metal, a compact and lightweight structure, and fine workmanship; Installation: This hinge repair kit is designed for easy installation, eliminating the need to replace the entire door handle; It helps to alleviate the jamming, abnormal noise or shaking of the sliding door during use and improve the operation of the door body., Manufacturer: PENGNAQP