This sliding glass door roller assembly is constructed from steel and features a height-adjustable housing. The concaved edge wheels installed in these roller assemblies are constructed of plastic and include steel ball bearings for smooth and long-lasting operation. The wheels are designed to glide on a single raised aluminum or steel track. This item includes only one roller assembly per package, but a total of 2 roller assemblies are required for each sliding door. These roller assemblies are used to repair patio sliding doors with missing, damaged or malfunctioning roller assemblies. Easy to install with a few simple tools. This style roller is used on Revco-West and similar styled patio doors.
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