mf8 Full-Function 2x3x4


  • $17.99




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Product Description

The MF8 2x3x4 is a fully-functional irregular cuboid in that no two sides have the same number of cubies. It turns smoothly out of the box and features solid construction.

Update: As of 20 Dec 2014, the MF8 2x3x4 is fully functional out of the box. It no longer requires extra internal parts to be installed to make it fully functional. Therefore, we won't be including the extra internal parts anymore.

Easy Returns!

Not completely satisfied with this product? We accept returns within 4 weeks (28 days) past the delivery date, for either store credit, or a full refund to the payment method — the choice is yours.

Click to see exclusions and more details on our returns policy

Our Promise to You

All of our products are guaranteed to be free of defects, or we will replace and reship at no cost to you. Please contact us within 4 weeks (28 days) past the delivery date to report any issues with items you have purchased.

Please note that some new cubes when being used for the first few times may experience what is termed a "pop". This is when one or more parts of a puzzle pop out without any damage actually being done to any of the pieces. This also occurs from time to time during normal usage. Pops are typically not considered a defect if the parts which come off can be reassembled by hand.

Fast & Free Shipping Available!

  • Free standard U.S. shipping (includes Hawaii, Alaska, and AFO/APO) (2-5 business days) is offered for orders with a subtotal of $45.00+. Free expedited shipping (1-3 business days) is offered at $75.00+.
  • All orders are shipped from our New York warehouse.
  • Orders are shipped the same business day they are placed, or the next business day. The cutoff for same day shipping is 3PM EST.
  • There is no processing/handling surcharge — all our shipping rates are at rock-bottom.
For our customers outside the U.S.:
  • We ship to all countries not sanctioned by the U.S. government.
  • We advise that you look into your country's customs laws before ordering.

Click to learn more about our shipping methods

Product Specifications
Manufacturer mf8
Type Cuboids
Added 2018-10-14
Gross Weight 86g

Customer Reviews

Based on 10 reviews
Michael L. (United States)

Puzzles arrived very quickly, and are the quality as expected. Thank you

Catherine K. (United States)
Fell apart on me

Stopped turning along one of the axes on my very first solve attempt, then little pieces started rattling out of the core, and eventually the bigger pieces came loose. There are a lot of tiny pieces and I’m not sure how to even go about reassembling them.

Reassembly might be a fun challenge for some, but it was not what I signed up for!

Danielle (United States)
Turns wonderfully if you're patient

If you try to turn this thing like a speedcube you're setting yourself up for failure. It's remarkably stable, and when it catches you can usually carefully persuade it to do what you need it to, assuming you have the updated version that doesn't internally bandage. Catches have become less and less frequent as I've done more solves, leading me to believe the culprit may have just been a bit of plastic flash that needed to be worn down. Overall, it's a fantastic solve that manages to be more difficult than most other puzzles its size. I highly recommend it as your first really challenging cuboid, after you've mastered the 3x3x4.

Don't take it apart

The turning is smooth and it's fairly fun to solve but be very careful turning it to avoid popping and misalignment of internal layers because this thing is a pain to reassemble and there are lots of small parts.

Fun but be careful

It is a well-lubricated, compact, and unique cuboid. However, internal pieces easily catch each other and even lock up the move sometime. It is a fun puzzle but should be handled carefully.

Enoch J.
Terrible. Just terrible

As I got the cube out of the box, it turned terrible. It was like the sides were refusing to move. After 30 seconds l, I was able to turn only three sides. I tried solving the cube, but suddenly exploded from so much force into the sides just for it to move. I could not put it together because of snapped pieces, and I feel totally cheated. Definitely do not recommend this puzzle. A total waste of 20 bucks!

Awesome HIGH quality Cube

I have used this brick for 3 months and it has NEVER popped, very solid. Not made for speed, but very sturdy. Pieces have never fallen out. Highly recommend. One of my favorite cubes. Small & fits in my pocket nicely because it is pretty flat. I really enjoy cuboids and bricks. This requires knowledge of cuboid algorithms and brick parity algorithm. I also love the 3x4x5 MF8 brick, but it is less stable. BUY BOTH :-)

Mitchell P.

So I got it with the internal pieces already installed. This puzzle turns well thee only thing is that it is a bit flimsy and does not corner cut that well. Also the cube locks up occasionally. This puzzle is not too difficult and pretty fun.

Daniel P.
Can't play with it much

So I got this cube today, and it turns great.
However, it catches up so many!
I couldn't even solve it once, without taking the cube apart and aligning the hidden middle layer.
Overall, it turns great & corner cuts even better, but sometimes it just locks up.

James M.

After installing the internal pieces that came with the puzzle, it works great, without any bandaging problems. You will most likely need to look up a tutorial on how to fix it. It is a fun, little, shape-shifting puzzle and a great, first, brick cuboid.