Size:MX-4 4g ARCTIC MX-4 High-Viscosity Thermal Compound has the distinctive characteristics of being non-capacitive, non-electricity-conductive, non-corrosive and non-bleeding. This makes ARCTIC MX-4 much safer and easier to use around sensitive and delicate applications involving electricity and heat than metal-based thermal compound. Perfectly safe for use around today's high-performance microprocessors (CPU) and graphic processors (GPU), accidental contacts with electrical pins/traces/leads will NOT cause short-circuits or static shocks compare to metal-based/capacitive thermal compounds. Under normal circumstances, carbon has the highest thermal conductivities of all know materials. ARCTIC MX-4's carbon micro-particles effectively and efficiently fill up microscopic pores and gaps between contact surfaces for optimum heat transfer. High thermal conductivity and low thermal resistance translate directly into efficient and quick heat dissipation. ARCTIC MX-4 is not only safe and easy to use; it also lasts a long time as well with its amazingly proven 8-year durability. ARCTIC MX-4 is available in 20g high-capacity, easy-to-apply tube that are both cost-effective and practical for frequent and high-volume applications. ARCTIC MX-4 high-viscosity thermal compound is also pre-applied or included with ARCTIC's award-winning coolers for today's most powerful desktop/gaming CPU and GPU. Contact arctic.usatarctic.ac for questions.