Soil Water Sampler, designed for near-surface installation, 6 inches (15 cm) to 6 feet (1.8 m) depth (depending on the length of Sampler), 1.9" (4.8 cm) outside diameter PVC tube, porous ceramic cup with a 2 bar (200 kPa) air-entry value (bubble point), Santoprene stopper, Neoprene access port. Clamping rings slip over the folded Neoprene tubing to seal the sampler. Extraction kit required, vacuum pump required.