Place rubber gasket onto desired area of glass and then apply U-Channel.
Shower Door U-Channel with Metal Strike Plate and Magnet Kit Set includes: Shower Door U-Channel with Stainless Steel Strike insert, Magnet and rubber gasket Size: 3" Color: Bright Chrome Fits Glass Thickness: 1/8", 5/32", 3/16", and 1/4". Installation Notes: The included (black) rubber gasket is ONLY for use with 1/8" glass; place the rubber gasket over the edge of the glass on the desired area and apply the u-channel over the gasket (this may require gentle tapping with a rubber mallet). For all other glass thicknesses: if the u-channel does not fit over the gasket, or is too tight with the gasket, clear silicone (such as Part No. 99AS-GLAM) can be used to secure the handle to the door.