These garage door rollers from Prime-Line feature durable steel construction with high impact Plastic tires. The quality steel ball bearings ensure that these rollers perform well in all weather environments with quiet trouble free operation. This style of roller has a 1-7/8 inch diameter wheel with a 3-1/2 inch stem and can be used on a variety of different garage door types. Brand Name: Prime-Line Width: 7/16 in. Length: 3.5 in. Diameter: 1-7/8 in. Material: Plastic Product Type: Garage Door Roller Color: Silver Application: Garage Door Roller Replacement Number in Package: 1 pk Packaging Type: Carded Roller Edge Type: Convex Axle Length: 3-1/2 High-Impact plastic rollers have outstanding performance characteristics in all weather environments Quiet Axle Diameter: 7/16 Trouble-Free Operation