Here is real sampling equipment for the real world in two student-friendly sizes. Mini nets are 5" in diameter and 15" long. Student nets are 8" in diameter and 20" long. All are available in three sizes of durable Nitex nylon, known for the accuracy of its mesh size. The mesh size guarantees you'll know the smallest size plankton you've collected. We also include our patented Mini-Dolphin adaptor for easy attachment of accessories and one 125 mL plastic bottle that attaches to the bottom of the net. Extra bottles are available. Optional hose/pinchcock can be used in place of bottle.Image may vary.