Well built and and the largest volume funnel that I could find. But, rather than being a product, it's a project. It didn't come with a flow control so I've had to buy parts and build my own flow valve. Also, the funnel has a radius of 5.4 inches while the wall mounting brackets are 3 inches from centre which means that it can't be flush mounted against a wall.
Excellent quality SPP at an affordable price. Definitely getting more this upcoming week.
TriClamp Flange Adaptor-Weldless Bulkhead Fitting
We'll definitely order OakStill parts again. They seem to be great quality and are delivered in a timely manner. We're happy!