Johnson Level 1819 0016 Tape Measure, Nonmagnetic Single Hook Tip, 16 ft, Plastic with Rubberized Grip, Silver 455748 Od (Mils) 439mils Insulation Thickness Od (Mils) 439mils Insulation Thickness (Mils) 50mils Allowable Ampacity At 75C 130 Jacket Thickness (Mils) 8mils No Range (F) 0 Degrees 400 Degrees F Type Solid Shaft System of Measurement Inch Surface Roughness 8 uin End Type Plain Ends Tolerance Class L Core Type Solid Operating Temperature Maximum 400 Degrees F Surface Hardness Minimum 50 HRC Roughness 8 12 uin RMS Operating Temperature Minimum 0 Degrees F Series NILSS Weight Per Inch 0 If you are looking for a simple way to take accurate measurements The Johnson 1819 0016 16 ft Tape Measure is the ideal tool for anyone who wants to make quick measurements