Product Description The Prime-Line M 6053 Frameless Shower Door Top Bracket Roller Assembly is constructed of extruded aluminum and comes in a glazing vinyl and chrome finish. It features round edge plastic wheels and has steel ball bearings to provide for long-lasting, smooth operation. These types of top hung roller assemblies are designed for use with sliding glass shower doors that do not use a frame. Installation tip: to prevent glass from slipping out from roller assemblies, follow the installation instructions which require the application of a small amount of clear silicone adhesive (RTV-108) and a 24-hour dry time prior to hanging/using doors again. From the Manufacturer Extruded aluminum bracket with glazing vinyl. Accepts up to 1/4 In. thick panels/ 3/4 In. outer diameter with an oval edge nylon ball bearing roller. Used on solid glass panels with no frame.