Wildco Water Sampling Field Kit For obtaining samples of water and plankton organisms, determining water transparency index, and measuring water depth to 20m. Includes one 1-liter horizontal style clear acrylic water bottle, thermometer (-40°C to +120°C in 1° graduations), 153µ mesh plankton net, standard secchi disc with black and white quadrants, and one 20m nylon line (can be marked with indelible ink). Sturdy plastic carrying case included.