Outer diameter 1: 58 mm, twist type: alternating twist, height 1: 11, 3 mm, inner diameter 1: 40 mm, material: FPM (fluorine rubber) Suitable for: Alfa Romeo 166 (936), 1970 cm³, 155 HP (114 kW), 9/1998 to 10/2000, vehicle identification number: 4136369, Alfa Romeo 166 (936), 2492 cm³, 190 HP (140 kW). 9/19 98 to 12/2006, vehicle identification number: 4136366, Alfa Romeo 166 Suitable for: Alfa 9948922, Citroen 1608816780, Citroen 236210, Citroen 312123, Citroen 312139, Citroen 312144, Citroen 96033706, Fiat 9403121440, Fiat 999489. 45618 2580, Fiat 9603370680, Fiat 9948922, Lancia For any questions about fitment please contact us via our Amazon dealer page