Tempered Glass Fermentation Weights for Fermenting in Wide Mouth Mason Jars

Tempering glass is expensive, but we think it's worth it. We have seen many glass fermentation weights that had air bubbles crack while in use.

These weights were designed to be the very best on the market for fermenting in wide mouth Mason jars. They are 68.5mm (2.7 inches) in diameter and 18.5mm (.73 inches) thick. They weigh 6 ounces each (170 grams).

The weights are cut from sheets of high quality tempered soda-lime glass. Mason jars themselves are made of untempered soda lime glass.

Most competing discs are not tempered, which is much cheaper to produce but less safe. Air bubbles and other imperfections in lower quality glass cause them to crack during use.

If you fill your jars up to the neck, one weight will perfectly cover your ferment. You can use more than one weight if the jar isn't completely full or if you want to displace more brine to bring the level up to the neck of the jar. With more active ferments, you might not want to fill the jar into the neck to avoid overflowing brine. Then you will probably want to use two weights.

Glass does not leach anything into your food.

Dishwasher safe, boiling water safe, oven safe, microwave safe. Avoid sudden temperature changes.

Plastic free packaging.

International shipping is $5 extra to Canada.

Returns Policy

You may return most new, unopened items within 30 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).

You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).

If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.

Shipping

We can ship to virtually any address in the world. Note that there are restrictions on some products, and some products cannot be shipped to international destinations.

When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.

Please also note that the shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound.