The zalman stg1 super thermal grease maximizes heat transfer by eliminating the minute air gaps between the heat source and the heat sink caused by irregular surfaces. This thermal grease is easy to use as it comes in a bottle with an applicator brush. This helps you to be able to add just the right amount of grease during your installations without creating a messy glop of ooze out the sides when tightening down your heat sink. The stg1 is also re usable, one bottle can have up to ten applications. Features: best performance: zalmans super thermal grease (stg) maximizes heat transfer by eliminating the minute air gap between the heat source and the heat sink caused by their irregular surfaces. Ease of use: the brush attached to the bottle enables easy application and also prevents unnecessary waste of grease. Easy storage: a sealed bottle keeps the grease fresh for longer time, which is necessary since the bottled quantity allows 10 or more times of use. Specifications: type: non-curing compound. Capacity: 3.5G. specific gravity: 2.86. Temperature stability: -45oc to 150oc (-49of to 302of). Thermal conductivity: 4w/mk.