With Sampling Rope --- The 16.4ft/ 5m long sampling rope is of moderate length, which can meet the sampling needs of deeper waters, is easy to control flexibly, and is not easy to get tangled with Valve --- The plankton net is equipped with valves to precisely control the flow of water in and out of the net to quickly screen the target organisms and improve the collection efficiency and purity of the samples. Experimental Grade Nylon --- Our plankton nets are made of experimental grade nylon, can tolerate acid and alkali, repeated cleaning is not easy to wear. The bottom collection tube uses Sturdy Aluminum Material, with high strength and remains intact even after long periods of underwater work Usage --- In the water depth from the surface to 0.5m, do the "∞" shape reciprocating slow drag at a speed of 20-30 cm/s for about 1-3 minutes, after sampling, clean and dry the plankton net and store it in a cool and dry place for later use Wide Application --- Fine mesh plankton net can effectively collect zooplankton samples for ocean, lake, reservoir, river, etc, for collecting phytoplankton, protozoa and rotifers