The Kramp P181208 is an inner air filter, serving as a safety filter for engine air intake systems. It is an equivalent to the genuine Donaldson P181208. This high-efficiency cellulose media filter provides essential protection by capturing fine contaminants, ensuring clean air flow to the engine. With an outer diameter of 80.5 mm, an inner diameter of 65.5 mm, and a length of 203.2 mm, it functions as a critical secondary filtration stage, extending the life of the primary air filter and preventing engine damage from dust and debris. It is commonly used in Donaldson FPG08 series air cleaner housings.