what is this ???

I have several original dampers here with them still inside. They could be from trucks. These have been being used as long as I can remember. If I were to say when they would help is a truck or a any engine used in a dirty environment . It keeps the road dirt from building up in front of the seal and prevents premature wear.

I never thought of using it for seepage collection from the seal. good idea. When ever you take them out, They are oil soaked.