Main Function: Help the door maintain balance, prevent swinging and ensure smooth sliding. Utility Design: U-shaped groove design, smooth surface can reduce friction, ensuring strong and large bearing capacity. Wheel Feature: Internal lubricating grease, smooth operation, good mute effect. It is durable with stable characteristics and long service time. Wide Application: V-Groove wheel is suitable for the door of shower room, living room, kitchen, etc. Note: The data are all measured manually, please allow 1-3cm error due to differences in light and display, there may be some color differences, please refer to the actual item received.