The Delmhorst 18ES is a 17 in. Hammer Electrode with 3 1/4 in. Penetration for Lumber/Wood Moisture Meters, mainly used for plaster, masonry and wood. It comes with 608 insulated pins for 3 1/4 in. penetration and is ideal for timber, poles, and ties.

• Probe Length: 17 inches
• Penetration Length: 3 1/4 inch
• For use with Lumber/Wood Moisture Meters