Atlas Z 75000026 Master 53' Evans Double Plug Door Box Car Georgia Pacific #16020Atlas Z 75000026 Master 53' Evans Double Plug Door Box Car Georgia Pacific #16020 Atlas Z 75000026 Master 53' Evans Double Plug Door Box Car Georgia Pacific #16020 Z scale is one of the smallest available model railroad scales at a ratio of 1: 220. Atlas recognizes the growing interest in Z scale with track offerings and now its first rolling stock model. Z is an optimum size for modelers with space limitations. The Evans 53' Double Plug Door (DPD)