10 pulleys in one set. Made of iron and plastic, with ball bearings inside, moving smoothly and durable. Suitable for your wardrobe, bookcase, glass cabinet and other office furniture. Note: The wheel diameter is 19mm, please check the size of your furniture to ensure that the pulley will meet your needs before purchasing. Features: 1 .Each product has a unique manufacturing part number on the label inside the package that proves it has been qualified, which include the part number, model number and inspection date information; 2.If you have any questions about the item, please provide us the reference number for manufacturing verification, your profits will be guaranteed. < p>3.10 pulleys in one set. 4.Made of iron and plastic, with ball bearings inside, moving smoothly and durable. 5. Suitable for your wardrobe, bookcase, glass cabinet and other office furniture. 6.Note: The wheel diameter is 19mm, please check the size of your furniture to ensure that the pulley will meet your needs before purchasing. Specifications: Material : iron and plastic Color: silver and white Size: 6.5 x 1.9 cm/6.5 x 1.9 cm (LxDia) Wheel diameter: 19 mm Weight: 250 g Package contents: 10 x pulley blocks Good quality product