K4787 Buna-N Round Cord Cross Section Actual 4.5 mm Overall Diameter 4.5 mm Color Black Material Buna-N Durometer 70A Standard Maximum Temperature 210 Degrees F Minimum Temperature 0 Degrees F Overall Length 50 ft Tensile Strength 725 psi Round Abrasion Resistance Good Chemical Resistance Fair Oil Resistance Excellent Water Resistance Good Weather Resistance Fair