Description: 【Design】The door and window attachment is specially designed for sliding doors and sliding windows. It can adapt to different widths of tracks, providing stable support and smooth sliding experience. 【Material】Attachment block is made of high quality ABS  material, which is sturdy and durable, and can maintain good working performance in various harsh environments. 【Easy To Install 】Window and door block is small in design, easy to install, and can be completed without professional tools, saving time and effort. 【Practical】Aluminum alloy door and window block which can be adjusted according to the actual needs of the doors and windows, providing more flexibility in use. 【Widely Used】Sliding door attachment can not only be used for household doors and windows but also suitable for commercial places such as shops, offices It is your ideal choice. Size Chart: Small:4.15cmx1.75cmx2cm/1.63inchx0.69inchx0.79inch Large:4.25cmx3.1cm/1.67inchx1.22inch Package Includes: 1 Sliding Window and Door Block  Note: Please allow slightly errors due to manual measurement and different monitors.