This is a sliding door and window pulley made of iron and nylon. It has a reasonable design and practical functions. It can let you have a more comfortable and smooth door and window sliding experience. Exquisite craftsmanship makes it quiet, durable, efficient and professional, which can better meet your needs. Features -Color:Silver andGreen. -Material:Iron, Nylon. -Size: About8.70X4.22X1.25cm/3.42X1.66X0.49inch. -Easy to install and disassemble, it can be well applied to your sliding door. -Exquisite workmanship, not rusty, durable and not easily deformed. -It is suitable for all kinds of sliding doors and windows you want to improve, and it will be a good home modification accessory for you. -The texture is firm, the bearing effect is good, and it is not easy to break. It can meet your needs well and bring you a better experience. -It is made of sturdy material with excellent texture and long service life.