DescriptionThis item is well made of premium material for durable and practical use. It allows the door to operate smoother, quieter, less stress on the opener (saving you that costly repair on the opener), less stress on the door hinges. These rollers alone will make a huge difference they dramatically reduce vibrations and noise caused by metal rollers.Feature- Color: As shown. - Material: Nylon. - Size: 10.5 x 4.5 x 4.5 cm. - Made of material, sturdy and durable. - Nylon shells around steel wheels, for the ultimate combination of quiet and durable. - Replacement rollers for residential and commercial garage doors. - These rollers are very heavy duty and will be the last rollers you need to buy for your garage doors. - Dear buyer, due to lighting effect, monitor's brightness, manual measurement, etc., there could be some slight differences in the color and size between the photo and the actual item. Sincerely hope that you can understand! Thank you!