Replaces the plastic part that holds the metal clamp piece which holds up the passenger front right window. Fits my 1999 Volkswagen Passat, and should fit other B5 and B5.5 types as well (1996-2005).There are two of these in the door. Each one is mounted reversed of the other one. The driver side is similar, and if someone is interested I can make that one as well.I recommend some sort of machining device to remote strands and make sure holes are the proper size (I printed using PLA).I also used some lithium grease to help it slide more easily.