Product Description This sliding glass door roller assembly is constructed from steel. It features a 1-1/4 in. ball bearing roller with an adjustable steel housing. This roller assembly is used by Christian Porter, Full view and other glass door manufacturers. From the Manufacturer This sliding glass door roller assembly is constructed from steel. It features a 1-1/4 in. ball bearing roller with an adjustable steel housing. This roller assembly is used by Christian Porter, Full view and other glass door manufacturers.