Product Details:

Top Hung Assembly
Steel Ball Bearing Inner-Race

This Sliding Shower Door Roller Assembly features a 3/4 inch (19 millimeter) flat edge nylon wheel with steel ball bearing inner-race. The aluminum bracket is 1-1/8 inches (28.6 millimeters) high.
Multiple holes in bracket allows for adjustment.

Wheel Diameter: 3/4 in (19 mm)
Bracket Height:   1-1/8 in (28.6 mm)

Minimum Order: 1 Package
Two roller assemblies with installation screws per package.