If you need a short sample and would rather not cut a filled liner in the field (and disposing of the contaminated sample and plastic), you should consider using a spacer. Spacers allow you to use a short liner in place of a longer liner. The spacer keeps the short liner stationary during the sampling procedure. For instance, if your sampler usually requires a 36 inch liner, you can use a 12 inch liner with a 24 inch spacer instead. Just remember the liner goes on the bottom and the spacer goes on top!