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. Function: Provides structural support for the door, enabling it to rotate, swing, open, or close smoothly, preventing misalignment or difficulty in closing; Structure: This sliding door roller hinge is made of metal and can withstand the wear and tear of daily use; Installation: This sliding door hinge is designed for DIY enthusiasts and can be easily installed with just a few tools and minimal technical knowledge; 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