Glass U-Channels U-channels secure glass into position and create a continuous, minimal profile that allows the maximum amount of natural light to enter the space. Dry 11/16" x 1-5/8" Glass U-Channel (UCD-0687x1625) Dry 1-5/8" x 1-5/8" Glass U-Channel (UCD-1625x1625) Dry 1-5/8" x 1-7/8" Glass U-Channel (UCD-1625x1875) Wet/Dry 1" x 1" Glass U-Channel (UWD-1000x1000) Wet/Dry 1.75" x 1" Glass U-Channel (UWD-1750x1000) Wet/Dry 2" x 1" Glass U-Channel (UWD-2000x1000) Wet/Dry 1" x 1.25" Glass U-Channel (UWD-1000x1250) Wet/Dry 2" x 1.25" Glass U-Channel (UWD-2000x1250)