【One-piece Molding】The overall wheel core of the wheel adopts precision CNC deep-processing and one-piece molding technology, which makes the product dense, harder, and durable. 【Double Ball Bearing】This U-Groove Wheel adopts double ball steel bearing and double-sided rubber cover seal, which makes the sliding more stable and smooth, and the door is easy to push. 【Anti-rust Color Plating】The surface of our steel pulley wheel is treated with anti-rust color plating, which can effectively prevent the wheel from rusting, enhance its corrosion resistance, and extend the service life of the pulley. 【Strong Load-bearing Capacity】This 2 Inches U track gate wheel has a strong support capacity. The heavy-duty casters are designed for loads up to 660 pounds. Light weight, easy to maintain, effectively reduce vibration and ensure noise-free and smooth operation. 【Widely Used】Used to inverted track, rolling gate, sliding gate, industrial machines, wire rope rail device, containers racks, baby gate, dog gate, etc. Corrosion resistant material: Made of high quality, it can be used for a long time without rusting. Smooth movement: The U-shaped groove design allows the wheels to move more smoothly on the track and can ensure stability. Suitable for many occasions: The product can be used for various purposes, including storage, industrial production lines and home decoration. High strength: Made with heavy iron for strength and durability. Easy to install: The product comes with bolts and nuts for quick installation.