This stainless steel tandem roller assembly is engineered for durability and smooth operation in sliding door systems. Constructed from 304 stainless steel, it resists corrosion and maintains consistent performance after repeated use. The wheel measures 5/16 inch in thickness and 1-1/4 inches in diameter, with a housing that is 11/16 inch wide, 1-3/16 inches tall, and 4-5/8 inches long. Mounting holes are spaced 5-3/4 inches apart on center. It supports up to 300 pounds and remains functional after 100,000 sliding cycles. Designed for compatibility with patio glass doors, it also works with wooden, aluminum alloy, and other common sliding door types. Installation requires removing the old roller, cleaning debris from the track, and securing the new assembly. Each set includes two complete roller units for balanced door support and straightforward replacement.