Prime-Line Adjustable Screen Door Roller Assembly is a 1-inch adjustable roller assembly designed for sliding screen doors. Featuring a nylon ball bearing roller, this adjustable design is primarily used on Academy Uni-fit doors. Each package contains two rollers per card, ing reliable performance and smooth operation. The roller width measures 1/4 inch, and the roller diameter is 1 inch. Available materials include nylon and steel, both equipped with a standard spiral spring type to ensure durability and ease of use. Model Number: 11434