Product size: Bi-fold door guide wheel hardware kit fits doors from 1 inch to 1-3/8 inch thick. Guide wheel is 2 inches long, wheel OD 7/8 inches, shaft OD 3/8 inches; top pivot is 2 inches long, metal head OD 1/4 inches, shaft OD 3/8 inches. Please check size chart before purchase. Reliable material: Closet door rollers are made of high quality nylon, stainless steel, and hard plastic. Precise size, well-made, reliable quality, waterproof and moisture-proof. It does not cause parts to break due to frequent sliding, allowing for long-term use. Easy to use: The guide wheels in the kit are fitted with springs to secure them to the door opening. With the built-in spring, the distance between the door and track can be slowly adjusted to quickly fit into the bracket and track for easy installation. Efficient repair: With our bi-folding door hardware kit, you can quickly replace and repair broken old doors without replacing the entire door. Suitable for repairing bi-folding closet doors, sliding doors, cabinet doors, and more. Bifold door top guide wheel is commonly used as bifold door replacement hardware. Bifold closet door repair part made of , with precise size and excellent workmanship, saving your time. Quantity: 8PCS Color: As Shown Material: Metal + Plastic Package Contents: 8 x Bi-Fold Door Top Roller Guide Wheel and Top Pivot Only the above package content is included; other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture to vary slightly from the actual product. Measurement may vary by +/- 1-3 cm.