Specifically designed for thin-layer stratification and near bottom studies. Collects water samples at any depth. Messenger-activated release mechanism closes a single sampler on the end of line. Constructed from clear polycarbonate, polyethylene and silicone, this bottle is EPA approved for “ultra-clean” analysis of water, including trace metals and organics. Unit includes: horizontal water bottle, 20.0m nylon cord, line reel, 250g solid bronze messenger, and plastic carrying case.