The Geotech Bladder Pump with .850" Drop-Tube is a highly efficient and reliable groundwater sampling tool. Designed for ease of use and durability, it allows for accurate and precise sampling of groundwater in a variety of environmental conditions. Its drop-tube feature ensures that samples are taken from the desired depth, while the bladder pump technology prevents sample contamination. Trust the Geotech Bladder Pump for all your groundwater sampling needs.