Your cart is empty.
Your cart is empty.Product Description
Any Regular Mouth 70mm canning jar which are commonly used .
Any wide mouth 87mm canning jar which are commonly used.
Any wide mouth 90mm canning jar which are commonly used.
Can be used within a pressure cooker, steam sterilizer or autoclave,You can also DIY them into regular mouth size or any other smaller sizes.
Used for Mushroom Cultivation
Shae
2025-09-01 15:59:00
Arrived on time, these disc fit perfectly on a regular sized ball jar. They appear to be correct and made strong. I do not know if they work yet as I haven't attempted to use. However they seem sturdy and possibly able to use multiple times. The steam bath will be test 1 and contamination will be test 2. They are significantly less money than you will find on some sites.
scottyfon
2025-08-31 17:29:08
These eliminate the problem of random mold spores landing atop the filter, which will always be moist enough for them to sprout and grow through a filter patch. They won't float up under the lid and get onto this filter. Also, it seems to allow more oxygen into the jar than those little filter patches over a hole drilled in the lid, resulting in faster and stronger growth. They are bleachable and can be used many times.I've switched from these to wide-mouth size for ease in cleaning jars after use.
Brian A Nolen
2025-08-10 14:30:17
I cut them in pieces and RTV'd them over small gas exchange holes in reusable plastic lids. Just what I needed, quality is good.
Ryan
2025-07-16 17:20:28
They're thick, definitely reusable and will last through steaming. I used them fluffy side up, and they let a little too much air through and my spawn rapidly started to dry out. Although my jars were in a very dry location, I'll be switching that next attempt.
mycogirl
2025-04-02 14:45:28
They do not fit in the lid properly and are so thick that the lid will not screw on all the way, and pops back off.
Heroic
2025-03-20 16:31:34
legit , arrived when stated
Renate Williams
2025-03-18 13:23:10
High quality
JAFO
2025-01-26 12:48:46
Size is perfect and they arrived super fast. I have two concerns with this product: 1) there are two sides-one smooth and glossy and the other other is felt-like and fuzzy. 2) they are about twice as thick as other brands and distorts too easily. Most likely this happened during manufactureand #1 is causal to #2. I can't help thinking that if both faces were shiny/heatt embossed this would be a non issue. Pretty sure I can't buy these agai and will have to go back my old vendor, bummer I wanted these to work.Pics above: top row: this product, alternating fuzzy side up, fuzzy side down. Bottom row: the 'other guys' product. You can see the fuzzy shiny of you zoom.
Recommended Products
$145.82
$ 58 .99 $58.99