Slide-Co 11123 Screen Door Tension Spring with Roller, 1-Inch Nylon, International,(Pack of 2) Sliding Screen Door Tension Spring Roller 1" Nylon Wheels Adjustable Steel Housing Used As Top & Bottom Roller on International Stamped aluminum housing, with steel spring Used as top and bottom roller on International series No. 900 925 950 doors Nylon wheel with center groove 1in. O.D Includes Fasteners