Package includes: 5 sets of fuel filters, including 5 black fuel filters, 5 yellow fuel filters, 5 2-hole gaskets and 5 primers, can use them on multiple engines at the same time. Size: Inner diameter is 3.5mm and outer diameter is 5.5mm, suitable for engines with 18mm tank opening. The length of black fuel hose is 26cm and yellow is 15cm. Type: Fuel filters are available for 2 stroke and 4 stroke. 2 hole joint: 2-hole oil seal can maintain good sealing. The trimmer's fuel line is soft and flexible and easy to install the carburetor on the engines. Wide Application: The fuel line is the perfect replacement part for many household machines, such as mower, lawnmower, chainsaw. Please check if the size of the accessory is compatible before purchasing. Product Description Specifications: Material: PVC and Rubber Color: Black, Yellow Size: Length: 26cm/15cm Inner diameter: approx. 3mm/0.1inch Outer Diameter: Approx. 5.5mm/0.2inch Package includes: 5 Fuel Hose (Black) 5 Fuel Hose (Yellow) 5 primer bulb 5 oil pipe grommet