Jergens®, 11038, Press Fit Plunger, Heavy Force, 0.5 in Diameter Body, 1.13 in Body Length, 0.437 in Plunger Diameter, 8 lb Initial End Force, 18 lb Final End Force, 0.161 in Plunger Projection, Low Carbon Steel Body, 400 Stainless Steel Nose, Black Oxide