1.Do you need something to help your gate move in the right direction without danger of it deviating from its guide rail? The installation of our guide equipped with olives will help your gate to remain in its axis during the manual opening and closing movement or with motorized sliding gate thanks to its small "elongated" nylon wheel mounted on an axis, which goes roll on itself and allow your gate to slide. 2. Structure composed of: inner body and nylon tread for smooth rotation. Nylon is a robust material, resistant to shocks and abrasion but also to low and high temperatures. It is also resistant to chemical agents. Great replacement for wheels when they are worn out or broken. Use for electric door, sliding door, etc. 3.Our nylon olive guide is constructed of heavy-duty steel to ensure indoor and outdoor use. 4.2 Nylon wheels as sliding door guide (2 units) | Cut : 40x60 | Material: Steel + Nylon | Uses: sliding door guide sleeve, electric door, sliding rollers, garage, sliding doors, sliding door wheels, conveyor belt or conveyor roller, pallet truck / pallet wheels, worn roller parts | Applications: Industrial and General Color: Silver Size: As Shown Quantity Sold: 2 pieces 1. New PA6 material (compared to PP: wear resistance, self-lubrication, toughness, 40% higher strength) 2. Wear resistance 3. Excellent self-lubrication 4. Good toughness and strength 5. Heavy weight (sinking in water) 6. High raw material prices Good advice Different lighting and display may cause a slight color difference between the product and the actual product. Measurement tolerance is +/- 1-3cm.