Capture water samples from specific depths with this clever tool. The unit is made from impact-resistant PVC, with soft rubber seals that hold up to 1.5 liters of liquid. A unique design allows for hassle-free sample collection: when the desired depth is reached, students simply jerk the attached line to close the apparatus. Includes a 20 m line on Styrofoam winding float. Unit is 30 cm long, 10 cm in diameter and weighs 2 pounds. Contents: PVC collection tube, 30cm long x 10cm wide, with rubber seals and quick-release pin Floating winding with line, 20m Activity guide