1PCS Treadmill belt drive belt PJ442/174J 4 Ribs Rubber multi groove belt multi wedge treadmill motor bike fitness Good performance: professional manufacturing, stable performance, oil resistance, heat resistance, long driving mileage and reliable performance. Material: Made of rubber material, wear-resistant, damage-resistant, not easy to break, anti-aging, durable. Inspect belts regularly and replace when worn to maintain peak performance. The transmission belt provides stable power output, professional workmanship, wear-resistant, durable.