Features:Heavy-Duty Construction: Made from thickened stainless steel with a galvanized-surface, ensuring superior durability and resistance to rust, wear, and heavy loadsDual Bearing System: Features double bearings for smoothing, low-friction rotation, enhancing efficiency and longevity in lifting and sliding applicationsVersatile Compatibility: Available in 4040mm and 5050mm sizes with three mounting options (Lifting Chain, Lifting Rings, Flat Tile), making it adaptable to various angle iron tracks and setupsPrecision-V-Groove Design: The triangles steel V-groove ensures secure tracking and alignment on angle iron rails, reducing slippage and improving operational stabilityMulti-Purpose Use: Ideal for cranes, lifting tools, sliding-gates, and other industrial or DIY projects requiring reliable, heavy-duty pulleys systemsNotice:1.Actual color may be slightly different from the image due to different light effect2.Please allow 1-3cm deviation due to manual measurementSpecifications: 50x50 angle iron pulleys (Lifting Chain type)40x40 angle iron pulleys (Lifting Chain type)40x40 angle iron pulleys (Lifting Rings type)50x50 angle iron pulleys (Lifting Rings type),50x50 angle iron pulleys (Flat Tile type)40x40 angle iron pulleys (Flat Tile type)Size: 18x14.5x2cm18.5x12.5x2cm12.5x12.5cm14.5x10.5cm13x9cm11x9cm