The Caterpillar 1966581 196-6581 Hydraulic Filter is an advanced high efficiency filter designed for easy installation in various vehicles. Manufactured by Caterpillar, this filter is made in the United States and is specifically designed for hydraulic systems. With its OE/OEM part number 1966581 and manufacturer part number 196-6581, this filter is a reliable and efficient solution for maintaining the performance of your vehicle's hydraulic system.