TroySys 98" Brushed Nickel Dry Glaze U-Channel Clear Vinyl 98" Brushed Nickel Dry Glaze U-Channel with Clear Vinyl is a brushed nickel metal U-shaped channel and clear vinyl combo for shower door installations which replaces the need for silicone sealants between the glass and metal. This means a quicker and neater shower door installation. For use with 3/8" (10 mm) glass shower doors. The clear vinyl hugs the inside of the u-channel where the glass rests and secures the glass