I can thoroughly recommend the better ZeroPak model with the twin pumps. Mine's done a lot of work now and still going strong.
As for bags, I've come to appreciate the precut bags as making them out of rolls is a right pain if you're processing a fair bit of fish/meat. Have a look on TardMe but look carefully at the prices/quantities to determine the best value. I have got some off Ali but very marginal cost savings to be had.
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