These eyelets work even better than I expected. I used these grommets on my tank as part of my lettuce garden's flooding and drainage system. They create an airtight connection so you can connect a 1/2 inch hose for water to flow through. The spigot connection is fully and effectively sealed and leak-free. You should make a hole no more than 3/8 inch wide and "push" the bushing into the hole. It's a pretty tight fit, but I always say "better safe than sorry." You can use silicone to "glue" the grommet in place, otherwise the grommet may pop out if you connect the hose. The only downside is that you only get 4 pieces. get, otherwise you will lose or lose them. Overall, I think this is a very good product. Thanks very much! C Cole PhD
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