This vintage FLEX OIL RUBBER ACCORDION style Thumb Pump Oil Oiler is a great addition to any gas and oil themed collection. The black color and original design make it a unique piece. It is a genuine item from the United States and has not been modified. The oil pump is made by FLEX OIL, a trusted brand in the industry. It is a type of all-purpose pump oil that is perfect for collectors or anyone interested in vintage gas and oil memorabilia. This item is a must-have for anyone who appreciates the history of gas and oil in the United States. 3 are the same size. 1 is smaller