Hi Cindy. Thanks for contacting Tundra Restaurant Supply with your question.
The True 810771 Door Gasket you've picked out will indeed fit your TR 31F - 2916488 freezer. It will not fit the 2693187 model though. For this one you'll want the True 810803 Door Gasket. I've included both gaskets below for your convenience.
Let us know if you need help finding anything else!
Answered on 1/23/2013 by Andrew Call from Boulder, CO