Just wondering if any one has used these. Saw them awhile back, can’t find them now. Put them in the hole and blow them up (with a foot pump) suppose to keep the holes from freezing up. They come either 20″ or 30″ long, and come in 8″ or 10″ for the hole size. Suppose to be able to let the air out take it out and not have to redrill holes the next day.
Thanks,
Frank