Model NC0812 is the Neighborhood Cats "See Through" Rear Release Door to fit model 206NC collapsible trap. Designed to fool the smartest and most trap shy cats. The clear acrylic rear release door allows cats to see completely through the trap and gives them confidence to enter believing they can walk through. Best if used in a natural funnel setting so the cat comes in the direction of the open trap door. This item will only work on models 206NC the Neighborhood Cats Collapsible Trap.