The pulley wheel is convenient and practical, with excellent texture, and can serve you for longtime without being easily . The craftsmanship can serve you well without breaking easily. This pulley wheel is a very practical and reliable for your needs.Features- Color: Black- Material:POM- Size: About 2.00X2.00X0.70cm/0.79X0.79X0.28in- Inner diameter: 5mm outer diameter:20mm, width: 7mm- The material is safe and , which is wear resistance and practical for the lasting time use.- Practical bearings reduce friction with the wheels, so smoother and more flexible use and great maneuverability are possible.- craftsmanship makes it have a sturdy structure, easy to slide and smoother to use.- These replacement sliding door wheels are a perfect accessory for your door, wardrobe or cabinet.- Professional ergonomic design concept, when in use, feel comfortably and experience excellently.Package list: 4 x Pulley Rollers