Lombardini pre-filtered air filter. OEM code: 3700.198, 3700198, 3700109. Air filter with pre-filter. Lombardini original filter. OEM code: 3700.198, 3700198, 3700109. . Parameters: Height: 290 mm Diameter: 120 mm Possible applications for Lombardini: 260C, 325C, 360C, 400, 400V, 503, 520, 522, 530, 6LD260, 6LD325, 6LD360, 6LD360V, 6LD400C, 6LD435, LDA500.