For 3/8" and 1/2" (10 and 12 mm) thick glass. Deep pocket does excellent job of securing fixed panels of glass. May be used alone or with regular depth U-Channel. Wet glazed with clear silicone to secure glass. End caps offered to conceal ends of channel. Use monolithic tempered glass Deep U-Channel is for securing fixed panels of glass to the wall, ceiling or floor. Widths suitable for 1/2" (12 mm) thick glass are available and are individually wrapped to protect the finish. The 3/4" (19 mm) high profile deep U-Channel can be used also as the top channel in installations where the glass must be inserted into the top, then lowered into the regular U-Channel used at the bottom of the enclosure.