Fine workmanship: The hand pump is made of high quality rubber and aluminum alloy. It is not easy to rust and reliable for long term use. Design: Our fuel hand pumps adopt low permeability material design to prevent fuel from evaporating and breaking down in hot and cold conditions. The connector has a stepped shape, which is convenient for installing the leather hose and will not fall off. Easy to use: The siphon pump is staggered to facilitate the installation of the hose and will not fall off. Can be connected to any length of pipe and is easy to use. Dimensions: Metal valve connector: 8mm, fuel pump overall size: 146 x 42mm. The manual intake manifold pumps are suitable for carburetors and low pressure fuel systems. Wide Application: The hand pump for gasoline is suitable for suction of vegetable oil, natural gas and gasoline, and is most commonly used for outboard or inboard engines. Note: The data is all measured manually, please allow 1-3cm error due to light and display