This is the complete engine oilseal kit in VITON (for maximum resistence against corrosive modern fuels) for Lambretta LI125 + LI150 Series 1 models (+ VERY early TV175 Series 2 models), where there are only TWO crankshaft oilseals (i.e. there is NO large inner magneto side oilseal and the N205 bearing which is lubricated by the oil in the fuel mix). The small outer magneto oilseal is 25 x 46 x 7. If you require the oilseal set for later models, where there are 3 x crankshaft oilseals, please see set Item : M114v