A gas spring for a vehicle suspension system includes a cylinder, a rod disposed within the cylinder, a relative movement between the rod and the cylinder changing the volume of a chamber formed between the rod and the cylinder, and an accumulator in communication with the chamber. And an electronic paper of the invention has a configuration for color display that the display sheet is made up by laminating respective display sheets for red, green and blue colors. The polarizing posts are arranged generally along a longitudinal axis of the first housing and with one of the posts being different from the other post.