Polythene filter funnels which can be used to determine flow rates of sand or water and for simple transfer of liquids or sand from 1 container to
Funnels can be used to determine flow rates of sand or water and for simple transfer of liquids or sand from 1 container to another. Set of 3 funnels with diameters of 75 mm, 95 mm and 120 mm, made from flexible yet strong polythene.