A composition comprising water atomised prealloyed iron-based steel powder is provided which steel powder comprises by weight-%: 0. In such computation, there is a disadvantage that high frequency components contained in steering wheel manipulation force brings about am unusually large steering wheel return force, and this gives a driver a feeling something like difficulty in adapting himself to the power steering. A second aperture defined in the top flap may permit access to contents of the vial without removing the vial from the inner portion, e.