Abstract: A vertical blind system installed over a window area has a plurality of carrier and hanger assembly units, each of which has a vertical louver or vane suspended from it. The unit has two major subcomponents. They are a frame having a chamber, and a replaceable, manually insertable cartridge having a pendant member for holding the individual blind. The frame has a top circular bearing and a resilient retaining clip which holds the cartridge in position in the chamber. Whenever the cartridge becomes broken, the service technician can quickly snap out the broken cartridge and reinsert a new one. This can be done without the inconvenience and time consuming task of dismantling the entire vertical blind system to repair a single carrier and hanger assembly unit.