This sliding patio door roller assembly is constructed from nylon. It features a 1-1/4 In. ball bearing wheel with an adjustable steel housing assembly. This type of roller assembly is used by many patio door manufacturers.

This sliding patio door roller assembly is constructed from nylon. It features a 1-1/4 In. ball bearing wheel with an adjustable steel housing assembly. This type of roller assembly is used by many patio door manufacturers.