Tradewinds Direct Weighing Funnels, Funnel size: Small Disposable polypropylene funnels in four different sizes Serve as weighing dishes plus sample transfer funnels. Designed to lie flat on a weighing balance Place funnel directly on balance, weigh out needed solids Small funnels fit 5, 10, 25 and 50mL volumetric flasks. Medium funnels fit 100, 200 and 250mL flasks