Anyone else notice some of the seals failing in the freezer after a while? I have several that looked good at Sealing and then lost the seal after .

Seems to be inherent within the product. Every brand that I have used does this. I to double seal and try not to get any moisture in the seal. One thing to remember is when frozen and moved around in freezer the bag is easily damaged. I found this especially true when freezing items with sharp bones like porterhouse. The bone hit hard surface and cuts through the bag.

Do they have a notch for easy tear?

Purchased 09/25/2020 (USA). The 200-pack 8" x 12" bags do have an "easy-tear" notch, located, on one side, about 2 inches from the FACTORY-SEALED end (not the open end that you manually seal). The (semi-circular) notch does make it very very easy to tear, especially once you clear the factory-sealed edge. As others have noted, this bag is actually very difficult to tear, but the notch makes it very easy. Note: this notch makes me suspect that if there's any slight tear, rip or cut damage to any portion of the factory-sealed edge, that edge is going to keep ripping open with any handling.

How do these compare quality wise to the food saver brand? and will they work with the food saver machine?

works well with food saver machine. have had no problems

Does this work in a polyScience vacuum chamber?

Dear my valued customers, these food saver 200 count vacuum sealer bags worked any type vacuum sealer ,like geryon, weston, foodsaver and so on .thanks for your valued side order 200 count quart food saver vaccum sealer bags

Brand	O2frepak
Model Number	200 Bags-6X10
Color	White
Product Dimensions	25 x 15 x 2 cm; 1.3 kg
Material	Food Grade PA+PE
Item Weight	1.3 Kilograms

O2frepak 200 Pint 6" x 10" Vacuum Sealer Bags with BPA Free and Heavy Duty, Vacuum Seal Food Sealer Bags,Great for Food Storage

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