Larger air boot for using big carbs like Nibbi 26-28-30mm and larger carbs on the KLX140.  These are nice and flexible - makes quick work of installing a big carb onto your bike.  No clamps are included and these can be cut or trimmed for a true custom fit. These are smooth on the outside and makes sealing the airbox simple over the tube with ridges that can create unwanted voids.  

These are 44.50mm ID or 1.75" and 6" in length.