Item #: FD4
Availability: In Stock

(NEW!) Take the guess work out of the air exchange equation with our new Polyfil filter disks. Constructed from a durable 1-1/4" inside diameter MDF plastic ring and 3M adhesive back, these disks have the perfect polyfil density to allow the right amount of air exchange for monotubs or any bulk casing style grow. Simply peel and stick over any size hole up to 1-1/4" diameter.

Features & Includes:

  • 4 Polyfil filter disks
  • 1" thick premium quality synthetic polyfil
  • Installs in seconds to any container
  • Filters and regulates air exchange
  • Reusable
Price: $5.00

    Quantity:

    Take the guess work out of the air exchange equation with our new Polyfil filter disks. Constructed from a durable 1-1/4" inside diameter MDF plastic ring and 3M adhesive back, these disks have the perfect polyfil density to allow the right amount of air exchange for monotubs or any bulk casing style grow. Simply peel and stick over any size hole up to 1-1/4" diameter.

    Features & Includes:

    • 4 Polyfil filter disks
    • 1" thick premium quality synthetic polyfil
    • Installs in seconds to any container
    • Filters and regulates air exchange
    • Reusable
    Overall Customer Rating of 4 Reviews:
    Vernal, Ut

    Mr. Mushroom

    Rating:
    Pros:
    • quality
    • customer service
    • customer service
    Cons:
    • they dont carry all the products i need
    I love these guys, they always have excellent products, and as far as fast shipping, I placed a couple orders with a few different companies about a week prior to this order, and received my order from Midwest a few days BEFORE my other orders. One of my main suppiers.. 100% satisfaction every time. oh yeah, I almost forgot.. these guys customer service is excellent as well. well ran company for sure.

    Vernal, Ut

    New Disks

    Rating:
    Pros:
    • quality
    • shipping
    • customer service
    Cons:
    These disks are great! High quality O-ring is very sturdy! I ordered a Bulk Kit a month ago and it was before they had this product, I emailed support after seeing the change and they sent me these for free. They are great, easy to apply and really do provide the perfect amount of air exchange for a bulk grow! 5 star plus!

    Dope!

    Rating:
    Pros:
    Cons:
    Plug in play! Love it. Easy as slappin a sticker on. awesome quality

    These are great!

    Rating:
    Pros:
    • durable
    • easy
    Cons:
    Thanks for selling these!! I always stuff too much polyfil in the holes or not enough! Finally I dont have to go through the trial and error on how much to fill the holes with!! These things are great and really durable! Do you guys offer these in larger quantities?? I will send an email too. Peace!

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