U Groove Pulley, 4pcs 0840UU Type Pulley Roller Guide Wheel for Rail Ball Bearing, Doors Windows, Sliding Door, 8x39.5x20.1mm, Black

U-SHAPED GROOVE DESIGN: Groove Wheel featuring a U-shaped groove design, U-type Pulley have a polished surface that reduces friction significantly, making them ideal for use in doors, windows, and various mechanical applications. QUIET AND EFFICIENT OPERATION: Groove Wheel features a precision U-shaped groove with internal lubrication grease, minimizing friction and noise for smooth, maintenance-free performance ideal for residential and commercial settings. DURABLE METAL-PLASTIC COMPOSITE CONSTRUCTION: Engineered with premium metal and plastic materials, these pulleys resist corrosion and wear, ensuring long-term reliability in high-traffic environments like sliding doors, industrial machinery, and furniture applications. WIDE RANGE OF APPLICATIONS: Each pulley supports up to 100kg (220lbs), making them suitable for demanding tasks such as lifting systems, conveyor belts, and heavy-duty sliding mechanisms. U-groove pulleys are suitable for a variety of industrial equipment, transmission machinery and equipment, printers, furniture and hardware, office equipment and so on. CONVENIENT 4-PACK SOLUTION: Roller Wheel set includes four well-crafted pulleys, Fits standard U-groove tracks (8mm ID x 39.5mm OD x 20.1mm thickness), offering versatile use in retrofitting doors/windows or integrating into new linear motion systems like garage doors and office equipment, providing ample quantity for multiple projects, ensuring versatility and usability in different setups., Weight: 0.2425084882 Pounds, Manufacturer: Regun