According to the present disclosure impact damage to a mail box and an associated support column can be prevented or at least minimized. Provided by the invention are the seeds, plants and derivatives of the soybean variety D4201139. The magnet can magnetically couple with the ferrofluid from the source for arranging the ferrofluid adjacent to the tool body for isolating an object positioned in a wellbore from effects of fluids present in the wellbore.