I buyed this two
Details about  2Pcs Thermal Conductive Heatsink Plaster Viscous Compound Glue for PC GPU NI5L
which is the same, two because tube are really small.

Features:
Prevent overheating & extend the life of your computer parts, LED flashlights and many other devices
Does not dry in the tube
Lasts for many small projects
Very strong after it dries
Great heat transfer / thermal
Low electrical conductivity (highly insulating)
Can be used for thermal coupling of electrical device to heatsinks, especially for CPU, Northbridge, Southbridge and GPU cooler use

Specification:
Melting capacity: 0 (200 degree celsius/ 24Hours)
Evaporation: 0.001% (200 degree celsius/ 24Hours)
Thermal conductivity: > 0.671W/m-K Thermal
Impedance: <0.246
Clotting time: 3min (25 degree celsius)
Strength of connected buildings: 25Kg
Insulation coefficient: > 5.1
Dissipation coefficient: <0.005
Temperature resistance: 200 degree celsius
Size: Approx. 6 x 1.7 x 1.2cm (L*W*H)
Net Weight: About 5g