From Little Giant, USA. These are quality funnels, made from polyethylene resin that is resistant to almost any chemical or lubricant. All have a fine-mesh brass screen built in. The thing about these funnels is they have bigger bowl capacities, so are less likely to over-flow than regular funnels. And the outlet is wide and fast flowing. A hook-hole flange is incorporated for hanging funnel up. Dimension is funnel opening diameter.