Birchwood Casey® Synthetic Gun Oil is a superior lubricant for all climates. Contains PTFE lubricants that significantly reduce the friction between mating surfaces. It will not gum up or lose its viscosity under extreme temperature variations ranging from -55°F to more than 300°F. The natural solvency of Synthetic Gun Oil cleans as it oils as it is synthetically formulated to clean as it oils. The low evaporation rate of synthetic oils provides long-lasting rust protection. Excellent for lubricating and protecting all firearm metal surfaces. Also makes an excellent lubricant for many household items, applications, and metal sports equipment and gear. This is a large 4.5 fl oz (135ml) can.