To make sure your air filter does not get dirty or used backwards after the first use, we recommend drawing an arrow with a sharpie on the side, facing in the direction the air should be flowing. We also suggest storing these in a clean zip lock bag. Also make sure this filter does not get wet, as it will not work after getting wet.
Use 1/4 in gas line. Dip hose end in hot water to soften. Purchase Gas Line Here