
Rubber funnel in bottle, metal strainer in rubber funnel. However, if you want to safely pour the resin into the funnel, you need to hold the funnel in place. It works, but it's not the most convenient setting. It's worth the low price. I got them to work with a funnel I printed that stays on the bottle and put the rubber and strainer in THAT funnel to keep the parts in place and not worry about messes .

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