4 Piece Hinged Ruler / Scale used as a Safety Gauge to measure Guard or Barrier Openings. Open size is 1.875"x20.5", folds into 1.875"x7.25". Screen-printed in spot colours directly on to the .060 White Styrene material makes for a long lasting quality item. Base price is for a 1 colour print. Optional back imprint and additional colour priced separately. Standard template with standard scale available, however, please feel free to supply your own customized one at no extra cost.