This Delmhorst 22-E Electrode enables you to accurately measure the moisture content of plaster, masonry, and wood. The included A-111 uninsulated contact pins guarantee an 11.18mm depth of penetration into the material. Simply connect this electrode to your Delmhorst moisture meter (sold separately) to test the moisture levels of plaster, masonry, and wood. It comes equipped with A-111 uninsulated contact pins, providing an 11.18mm depth of penetration. Additionally, it is compatible with 496 insulated pins (sold separately) for a 26.92mm depth of penetration option.