Compatibility: This pack of fuel tank vent line replacements is specifically designed for Stihl chainsaws. It is compatible with models 021, 023, 025, 028, 029, 038, 039, 048, MS250, and MS290. These vent lines are engineered to fit and function as direct replacements for the original parts.Fuel Tank Ventilation: The vent lines play a crucial role in maintaining proper ventilation within the fuel tank. They prevent the formation of a vacuum inside the tank, which can hinder fuel flow and affect the chainsaw's performance. With these replacement vent lines, you can ensure continuous fuel supply and optimal operation.Pack of 2: This product includes a pack of two fuel tank vent line replacements, allowing you to replace both vent lines simultaneously. It provides convenience and ensures that you have a spare vent line for future maintenance needs.High-Quality Construction: The fuel tank vent lines are made from durable materials that can withstand the demands of chainsaw operation. They are designed to be resistant to fuel and other chemicals, ensuring longevity and reliable performance.Easy Installation: Installing the replacement fuel tank vent lines is a straightforward process. Simply remove the old vent lines and replace them with the new ones, ensuring a secure and proper fit. It is recommended to refer to the chainsaw's user manual or seek professional assistance for accurate installation.