I use this funnel for Justrite 5 gallon and 2.5 gallon gas cans. I would not recommend using Justrite lenses due to the poor design and need for a funnel in this style. These funnels allow fuel to pass through when the canisters are full when filling. Once the jars are about half full I have no problems with leaks. I've used Eagle cans with their funnel and haven't had any leaks as their funnel sits much closer to the spout. The only reason I have Justrite jars is because they were free. If you already have jerry cans I would recommend cheaper funnels, they work better and spill less fuel. This funnel is too expensive for what it does.
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