Feature:1. It features high strength, good toughness, wear resistance, good chemical stability characteristics.2. Made of high quality steel and designed for lasting performance and long durablity3. It can be used in industrial machines, carts, doors and window4. Featuring wide temperature range, it can be used in the range of -40-100.5. Easy for installation, reliable quality ensuring stable and excellent performance.Specification:Item Type: Sliding Gate RollerMaterial: SteelRoller Diameter: Approx.32mm / 1.3inRoller Width: Approx. 25mm / 1inGroove Width: Approx. 15mm / 0.6inBase Length: Approx. 55mm / 2.2inHole Distance: Approx. 24mm / 0.9in2 .Package List:2 x RollerNote:Please allow 1-3cm error due to manual measurement. Thanks for your understanding.