Genuine Bosch 200mm headlight lens as used on many Guzzi models. These headlight lenses measure 200mm (~7.5 inches) maximum, and the forward part of the lens, which would be visible at the front of the motorcycle (the exposed part not under the chrome ring) measures about 7.25 inches. Compatible with many models with the large round 200mm Bosch headlights from the 1980s through the 2000s, some 1000cc, mostly on 1100cc. Measure your headlight to be sure. This lens is for drivers driving on the right hand side of the road.