This product can be used for oil drainage and brake or clutch bleeding it is also ideal for contaminated fuel the product has a 12litre capacity and is complete with 4 adaptor tubes including one for brake and clutch bleeding by the nature of the task the observation cap is considered consumable and 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 and agricultural b