Microppose Bag Opener – One-Swipe Spawn Bag Cutter
Microppose Bag Opener – One-Swipe Spawn Bag Cutter is backordered and will ship as soon as it is back in stock.
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Description
Description
Every grower has done it: one hand holding a colonized bag, the other hunting for scissors that walked off two weeks ago. Then you tear the film by hand, get a jagged edge, and spill spawn across the table.
The Microppose Bag Opener ends that. Hang it on your flow hood, your shelf rack, a nail by the door — grab it, one swipe, done. The stainless steel blade sits recessed in the body, so it parts the poly film and nothing else. Clean straight cut, every time.
- BladeStainless
- Hang holesTwo
- UseOne-handed
- ReusableYes
- Weight3 oz
See it in action
Why growers keep one on every shelf
- It never walks off. Two hang holes mean it lives on your flow hood frame, tub shelf, or grow tent pole — not at the bottom of a drawer.
- It won't gouge your substrate. The blade is set back in the body, so it catches film and stops. No slicing into a colonized block you just spent three weeks growing.
- Gloves-on friendly. Wide flat body, one-handed pull, no pinching a tiny scissor loop through nitrile.
- Wipes down in seconds. Smooth molded body — a quick pass with 70% isopropyl and it's ready to go back in front of the hood.
- Cheaper than losing a bag. One torn liner costs more than this tool.
How to use it
- Hang it where you work. Loop the large hole over a bolt, hook, or shelf post at your flow hood or work table so it's always within reach.
- Pinch the bag, hook the tip. Hold the top of the bag taut with one hand and set the nose of the opener against the film.
- Pull straight across. One smooth motion gives you a clean, even opening — ready to inoculate, break and shake, or transfer to bulk.
Pro tip: Cut low enough to leave headroom above the fill line. That extra film gives you something to fold, clip, or impulse-seal shut if you're not finishing the bag in one session.
Specifications
| Product | Microppose Bag Opener / bag cutter |
| Blade | Stainless steel, recessed, fixed |
| Body | Molded plastic, white, Microppose branded |
| Hang points | Two — one large, one small |
| Weight | 3 oz |
| Designed for | Grain spawn bags, all-in-one grow bags, bulk substrate bags, monotub liners, poly film |
| Cleaning | Wipe with 70% isopropyl alcohol. Do not autoclave. |
| Reusable | Yes — no blade changes required |
Safety: This tool contains a sharp blade. Keep away from children. Always cut away from your body and away from your other hand. Not a toy.
Frequently asked questions
What kinds of bags does it open?
Any poly film bag used in cultivation — grain spawn bags, all-in-one grow bags, bulk substrate bags, monotub liners, filter patch bags, and vacuum-seal pouches. It also handles the outer packaging on most supplies you receive.
Will it cut into my grain or substrate?
No. The stainless steel blade sits recessed inside the body, so it only reaches far enough to part the film. That's the whole point of the design — you can open a fully colonized bag without nicking the block underneath.
Can I use it in front of a flow hood?
Yes. Wipe the body and blade down with 70% isopropyl alcohol before you bring it into your work area, the same as you would with any other tool. Do not autoclave it — the body is plastic.
Is the blade replaceable?
No, the blade is fixed. It's built to last through hundreds of bags, and at this price most growers just keep a few on hand and hang one at each station.
How many should I get?
Most people order one per work area — one at the flow hood, one at the fruiting shelf, one in the kitchen drawer. They're small, they're cheap, and the one you can reach is the one you'll actually use.
Do you use these yourselves?
Yes. These are the same openers we run in our own lab and fulfillment area — they're hanging on the flow hood frames in the photos above.
Add one to your order. It ships in the same box as whatever else you're buying, so there's no extra shipping cost to grab a couple.
Let customers speak for us
What a great grow, and my first tub method. I didn't use the bag, I used a 28 qt monotub and the first flush was awesome. Innoculated on 06/06, harvest 1st flush on 08/14. I used a multi spore syringe and no break or shake was necessary. Spore Genetics 🧬 Gt Plat! I used the 30oz jar twice, once for spawn, then for final drying with silica gel/activated alumina.
Still waiting on the substrate to fully colonize before I begin fruiting, but it looks like it's coming along nicely after only 14 days.... This is my very first attempt at mycology, so I'm hoping for good results (without too much let down).
Cultivating a medicinal strain - "Blue Nips"
Began with a spore syringe I got from a friend, and WBS to get my mycelium going, and thought I'd give this master mix a try.... If I can, I'll update this review after my first flush!
Midwest, grow kits, they're
Midwest wild horse bulk substrate manure booster is the absolute bomb. I put it in my tubs, I break up. I know it's supposed to be one pack. I guess which is £1 per 44 qt minotube. I have a whole bunch of their minotubes. So what I do is I break up 11 pound pack of boot manure booster between two tubs, two toads, each being forty four quart, each I break it up between two I found that works best you put it on the bottom of the tub in between your tub, the liner and then you put in a half of the manure base, then you add in your mycelium, your grain mycelium, and then you add your substrate in a not as thick a manner as you would think, but well enough midwest grow kits is one of the best in the market.The goat
Best mycology products ON THE MARKET!!!😇😇🥰🥰🥶🥳😱💩👽💯🙏👀🗣 AWESOME CUSTOMER SERVICE! ALWAYS HAS WHAT YOU NEED!!!
HEAVY D
I've been using these jars for years now with a very high success rate. But I've also had good success with their substrates and pretty much everything I've gotten from this store. Thank you Midwest Grow Kits
I buy most of my supplies here when needed and they never disappoint. If I have an issue they are quick to respond and its typically my fault hahaha.
When I saw my first pin, my universe opened up. mind blowing hobby!
Love it. Easy to put together. Holds a lot of jars, trays, bags, totes, ect. I'm going to get another one for fruiting.
Red sorghum sprouts offers higher antioxidant levels, easier digestion, and rich plant nutrients. Sprouting red sorghum improves its health value by increasing beneficial compounds and reducing barriers to absorbing its nutrients.
Mycelium shot through the casing layer in 2 days. GtPlat. 2/1
Outstanding materials at the lowest cost I could find. Would not pass up this offer if you're serious about growing
This definitely does the job and it’s an excellent product for the price. It took be about 2 hours to set it up and make all the necessary modifications. The FAN solution that comes with it is at best temporary but it will due the job until you can save up for a better fan.
I plan to make tinctures for the messed up nerves in my arms, and other chronic pain bs. Don't want to support too many opportunistic companies, so I just chose the source and be patient. Holistic care and responsibility is a game of patience and understanding. I appreciate your services! Be well, do good! Try to waste less. Oh, the small black gloves are useless unless you have the hands of a small child.😅
Just stirred it, don't worry🫠 no stir bars or magnets have ever been needed here.
Awesome growth 10 days after inoculation. Very happy! Would recommend this priduct and this company!
Working good. Lights my closet just enough for the environment I need! Thanks!
