The educational plankton net has an opening diameter of 150mm and mesh size of 250µm. It is ideal for educational use or for those who require an economical net for trial sampling. The net has an industrial nylon collar which is fitted onto a strong nylon ring. The tow rope is connected to the ring via a three-point harness. The cod end of the net is fitted with a 250µm filter. Weight loops are also provided, although users will need to supply their own weights.