3" X 12" Multi-Stage Soil Core Sampler Extension Section

3" X 12" Multi-Stage Soil Core Sampler Extension Section. The multi-stage soil core sampler extension sections have a female top thread and a male bottom thread which allow them to connect to the multi-stage core sampler body, as well as to each other. These extension sections allow the user to extend the sampler body to collect samples of longer lengths. Multi-stage extension sections are made of 300-series stainless steel.