The invention concerns 1-H-3-arylpyrrolidine-2,4-dione derivatives of formula, in which A, B, G, X, Y and Z are as defined in the description, methods of preparing them and intermediates used in their preparation. The composition is particularly useful for molding automotive under-the-hood components that exhibit an improved balance of moldability, heat resistance, and resistance to brittle failure. The duct assembly is connected to a first support which is pivotable about a first axis, and to a second support which is pivotable about a second axis spaced from the first axis. The hoop thereby supports the bag so that the bag hangs through the opening when the hoop is raised. A cap is affixed to a flat portion of the spring element. With the addition of the first board mounting legs, the connector can be more stably mounted on the printed circuit board.