TPI FK11M Polyurethane K-Type Chisel Tip Penetration Probe with Sub-Miniature Plug, -58 to 500 Degree F, 4" Stem, 1/8" Diameter, 39-25/64" Lead Length 4" sealed stem for immersion into liquids, gels and semi-solids Stem sealed to protect sensing area Probe tip: 20 Made of polyurethane Stem measures 1/2" diameter by 4-1/2" length and 39-25/64" lead length