Jergens®, 11031, Press Fit Plunger, Light Force, 0.188 in Diameter Body, 0.405 in Body Length, 0.156 in Plunger Diameter, 1 lb Initial End Force, 2.5 lb Final End Force, 0.058 in Plunger Projection, Low Carbon Steel Body, 400 Stainless Steel Nose, Black Oxide