Features: 1. 6mm width closed loop timing belt for 3D printer. 2. Black belt with fiberglass reinforced, great transmission capability. 3. Made of rubber material, very flexible, durable and practical. 4. Low elongation, low noise, high wear resistance and good crack resistance. 5. Excellent process with great quality, great accessory for 3D printer. Specification: Suitable: For 3D Printer Material: Rubber Shape: Cloesd Loop Timing Belt Width: 6mm Weight: About 3-7g Package Included: 1 * Timing Belt