Prime-Line B 570 1'' in. D X 0.25'' in. L Spring Tension Roller 2-ct Nylon/Steel The Prime-Line B 570 1 in. D X 0.25 in. L Nylon/Steel Spring Tension Roller is a high-quality roller designed for use with doors and other hardware. Made by Prime Line Products, a trusted brand in the industry, this roller combines durable nylon and steel materials to ensure smooth and reliable operation. With its compact 1 inch diameter and 0.25 inch length, this roller is ideal for a variety of home improvement projects, providing tension and support for your doors and hardware. Product Type: Spring Tension Roller Assembly Brand: Prime-Line Material: Nylon/Steel Color: Not Specified Compatibility: Sliding Screen Doors Diameter: 1 in Length: 0.25 in Number in Package: 2 pk Part Number: B 570