Review on Efficient Resin & Mineral Tank Filling Funnel - 2.5" x 10" for Optimal Performance by Robert White

Works great. Fits snugly in the hole in the top of the tank and appears to be the correct size. It's big enough to catch all the materials from the shovel, but not so big that you lose your balance, fall over and splash. It doesn't have a tank attachment, so I actually hold the funnel with one hand when pouring from a ladle. It seems perfect for the task it is intended for. Shape and size just right. It's not made out of really durable plastic and might not really stand up to rough use, but I've been using it for about 17 months. It is still in perfect condition. If I ever break or lose this one I will definitely buy another one. This is really a super useful product. It's not obvious, but it helps fill the tank. FIVE STARS all the way!