Downhole data printing is made easy with Paper Unlimited's 20 lb. Xerographic Prefold Paper with a 6.25" fold. Designed primarily for black and white printing with spot color, our 12" X 500' flat pack of 6.25 inch fan fold paper is the premier line of seismic well log media in the country. Paper Unlimited product number FX20B12F614P includes 2 premium 500' flat packs.