Prime-Line D 1526 Sliding Door Roller Assembly with 1-1/4 inch Steel Ball Bearing Product Description This roller is constructed from steel. It comes affixed to an adjustable steel housing assembly. Used by Pacific and other glass door manufacturers. From the Manufacturer This roller is constructed from steel. It comes affixed to an adjustable steel housing assembly. Used by Pacific and other glass door manufacturers. Features Used by Solar Industries and several other metal framed patio door manufacturers 1-1/4 in. diameter roller C-tab housing with rear adjust Steel housing and ball bearing roller The C-shaped tab fits around the corner screw, it is captured by the side stile and bottom rail as the screw draws the two sides together Easy to install USA SHIPPING estimates delivery times and we work to get your item to you as quickly as possible and within those times, but please know it may take slightly longer than the estimate.