Arctic Silver 5 (AS5-12G) 12G Polysynthetic Silver Thermal Compound + MicroFiber (7" X 6") Cleaning Cloth Arctic Silver 5 12G Polysynthetic Silver Thermal Grease CPU Heat Sink Compound General Features: 12 grams of high density Polysynthetic Silver Thermal Compound (Thermal Grease) for CPU use Contains 99.9% pure silver High density Controlled Triple-Phase Viscosity Bonus: MicroFiber 7" x 6" cleaning cloth Included. Extremely fine lint free microfiber leaves zero scratches, streaks or marks. Safe for all CPU's surfaces Each microfiber is individually and neatly packed in its own polyurethane plastic bag for long term safekeeping.