This is a filter designed specifically for Adblue pumps and meters: Manufactured with materials compatible with Adblue chemicals. Long-lasting usage with a cleanable filter. Inlet and outlet size is 1 inch.Plastic Cleanable Filter 1'' Small (Adblue)Technical information; Designed for use with AdBlue pumps and meters. Made from materials compatible with AdBlue. Cleanable filter element for a long service life. 1″ inlet and outlet connections.