The Tiffen Series 9 81EF Light Balancing Filter helps to decrease the color temperature by 650K in order to warm the image slightly in order to match the color quality of illumination. When using an 81EF filter, you will be able to attain 3200K balance when the prevailing light source is 3850K. The warming effect of this filter requires a 0.6-stop increase in exposure for normal results.
Please see Tiffen Series 9 81EF Light Balancing Filter S981EF B&H Photo (bhphotovideo.com) for a similar filter.
The filter shown in the photographs is the one I am selling. I took these photographs a couple of days ago. The filter was lightly used some time ago and has been stored in a temperature and humidity-controlled room since then. It comes with the original Tiffen pouch, with Velcro closing.