The vacuum function is very difficult to use, even when placed over a hole it does not always create a vacuum. And when that happens, each little pump sucks in so little air that you have to do it a million times. But to make matters worse, I vacuum sealed all my coils and made sure the zipper was fully closed. After 30 minutes, the bag will look like it was never vacuumed. He couldn't stand this vacuum. I am very disappointed and recommend you to buy something else. UPDATE: Two weeks later, out of the 10 packs I used, 5 have already failed. And I'm very careful with them not to pierce them and abuse them.
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