1、Made of high quality plastic and metal materials, it has stable quality and long service life. 2、High strength, good toughness, low creep, abrasion resistance and chemical stability. 3、Move door to save space, more beautiful. Can ease the vibration, no noise and smooth operation. 4、Keep the door balanced, avoid shaking, and ensure a smooth slide. 5、Especially lightweight, easy maintenance. Features: Made of high quality plastic and metal materials, it has stable quality and long service life. High strength, good toughness, low creep, abrasion resistance and chemical stability. Move door to save space, more beautiful. Can ease the vibration, no noise and smooth operation. Keep the door balanced, avoid shaking, and ensure a smooth slide. Especially lightweight, easy maintenance. Specifications: Condition: 100% Brand New Item Type: Sliding Roller Material: Plastic + Metal Color: Black Size: Approx. 7 * 3.4 * 1.5cm / 2.8 * 1.3 * 0.6inch Weight: Approx. 286g Package List: 2 * Sliding Roller