What are you sealing and how big are the bags? For the most part vac sealed bags are for storage for no more than 2 years. If you are only planning on keeping the food for only that long then obsorbers are not needed. It seems about half of the bags will loose their seal in 6 months, at least that has been my experience. How long are your bags going to be kept?
I dehydrated veggies and vacum sealed them but then heard I need o2 absorbers I would like to keep them sealed for as long as I can also want seal rice and beans
It maybe more cost effective to use mylar. Foodsaver bags are expensive. Generic brand vac bags I have used dont hold a seal. If you putting away rice, beans etc go to mylar with an absorber. You can get from 1/2 gallon size to 6 gallon. They are even making zip lock mylar bags that have enough top so they can be heat sealed and once opened for use the zip lock can be used. I purchase stuff at the link below, I dont have any affiliation. They also have alot of information to check out. www.usaemergencysupply.com