TroySys 98" Chrome Deep U-Channel for 1/2" Thick Glass 98" Chrome Deep U-Channel for 1/2" Thick Glass is a chrome metal u-shaped channel for quick and easy shower door installations. Used for securing 1/2" thick glass to the wall, ceiling or floor. 3/4" deep U-channel can be used both at the top and bottom of the shower enclosure during installation. Deep U-channel pocket secures shower door glass panels firmly into place