This product can be used for oil drainage & brake or clutch bleeding It is also ideal for contaminated fuel The product has a 12litre capacity & is complete with 4 adaptor tubes including one for brake & clutch bleeding By the nature of the task the observation cap is considered consumable & is available as a replacement When using Petrol it is always advisable to clean thoroughly after use to prolong the life of the cap Suitable for all trades including Marine & Agricultural but especially for automotive use on Cars Motorcycles Trucks etc