Left hand / Drivers side roof weather strip retainer for 1997-2004 Corvettes with removable roofs.  This channel (part #4 in diagram) screws to the side of the roof frame and holds the weather strip (part#6 in diagram, not included).  Notice also there is a blowout clip (part# 45 in diagram, not included) on each side that goes in the second screw hole back and attaches in between this channel and the roof frame.