Description Designed for smooth and quiet garage door operation, this garage door roller features a heavy duty bearing and track wheel structure that minimizes noise when sliding. The universal iron pulley adapts easily to various track shapes, providing stable performance on door sliding bearings, and making it ideal for garages, sheds, and warehouses. Features -Color:Silver -Material:Iron -Size:12.00X4.60X4.60cm/4.72X1.81X1.81in -Silent operation: the garage door quiet roller and silent garage door wheel ensure smooth, noisefree movement, improving comfort in your home every time the door is used -Durable structure: heavy duty garage door roller with door sliding bearing features a wearresistant shaft and pulley bearings for lasting reliability and reduced maintenance costs -Universal fit: this garage door roller assembly adapts easily to garage door track wheel shapes, providing flexible installation and suitable performance for various door track roller systems -Stable movement: the garage door iron pulley and garage door track pulley provide enhanced grip and prevent slipping, ensuring consistent door track performance in daily operation -Weather resistant: garage door roller hardware and iron sliding track roller are designed to withstand all weather conditions, reliably supporting your doors' operation throughout the yearPackage list: 4 x garage door pulleys