Shower Door U-Channel with Metal Strike Plate Size: 3" Color: Dark Bronze Fits Glass Thickness: 3/8" and 5/16" Installation Instructions: Place the rubber gasket over the edge of the glass on the desired area and apply the U-Channel over the gasket (this may be a tight fit). If the u-channel does not fit over the gasket, you can remove the gasket and use clear silicone to secure the u-channel. Set includes: Shower Door U-Channel with Stainless Steel Strike insert, Magnet and rubber gasket. Note: For glass that has a 5/16" thickness, use the black rubber gasket provided.