Check the listing for details. BAS20 Taylor #80 WEEKLY Barograph Chart, 28"-31" . Condition: New. Listed at 31.12 USD. One year's supply BAS20 barograph charts (Taylor chart No. 80), 28"-31", WEEKLY (168 hrs.) for vintage Taylor Instruments, Inc. barograph. Cut paper size measures 3.80" x 13". These charts use no-bleed paper. As you can see from the photos, the pressure span is 28" to 31". (Multi-colored banded charts are no longer available.) Please note that when viewing charts on eBay, colors can vary depending on your monitor settings, and printer toner variations sometimes occur with different brands of toners. Also, please note that charts need to be cut on the dotted lines as shown on the eBay images for these charts. (Paper cutters can give you the best results.) Thank you for not leaving negative feedback which hurts my business and doesn't help you . If you have questions or concerns, please send a message and I will be happy to work with you. If you aren't sure if this chart will fit your instrument, send a message. I can design a new chart for any barograph. And now MONTHLY Taylor barograph or thermograph charts are available on eBay! You just need an inexpensive Nearpow Duty Cycle Timer (eBay) and you won't have to change charts every week! Set the timer to turn ON 7 min., and OFF 24 min. If your chart motor makes noise, it might because it was intended to run on 110vac not 120vac. To silence it, try adding a 5 Watt 1K ohm power resistor on one side of the power cord, but put it inside the bottom of the instrument for safety.This sale is for charts only, and does not include a barograph.