Product Features: The Square Lock tube is in good flexibility and extensibility and surface is neat. The characteristics of tube can be adjusted customized according to different requirements. The tube can be coated with braiding or plastic cover. The material of plastic cover is optional for different characteristics of oil resistant, abrasion resistant, low temperature resistant or fire retardant. Application: Applications: Protection of power cable and wire which are widely used in different areas, such as building, machines, elevators, security system, outdoor lighting system and etc