Noctua NT-H1 Thermal Compound_ Retail. Spec. Volume : 1.4ml ( for at least 15 application ) Specific Gravity : 2.49 g / cm³ Colour : Grey Recommended storage time : up to 2 years Recommended usage time ( on the CPU ) : up to 3 years Peak operating temperature : -50˚C to + 110℃ Recommended operating temperature : -40℃ to + 90℃