Coperchio Valvola Aspiraz. Lav Genuine Mattei lubricants and parts are engineered with the same durability and value that we put into our air compressors systems. Other air compressor manufacturers often charge a small fortune for genuine parts and oil, which sends you looking for alternative suppliers. Mattei uses a common sense approach. Our parts are reasonably priced to ensure you get top performance at a price you can afford. Get what you pay for with our Genuine Mattei lubricants and performance parts.