Wilson's ULTIMA-LUBE II OIL-4OZ BOTTLE is a high-performance lubricant designed for optimal firearm maintenance. Engineered with a blend of petroleum and synthetic lubricants, it ensures superior performance and wear inhibition for semi-auto weapons and custom firearms. Its thin viscosity penetrates hard-to-reach areas, making it ideal for cold weather use, with a temperature range of 10° to 350° F.