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YJ MGC SQ-1 Replacement Core Piece (Set of 2)
YJ MGC SQ-1 Replacement Core Piece (Set of 2)

YJ MGC SQ-1 Replacement Core Piece (Set of 2)


  • $1.99 USD

Product Description

These are replacements for the innermost parts of the YJ MGC Square-1's core. If yours is damaged from use, simply pry off the damaged parts from your old core and replace them with these new parts.

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.

The corners on 2x2 puzzles should not be twisted as doing so may snap the piece. Damage caused by corner twisting is not considered to be a defect.

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 $55.00+. Free expedited shipping (1-3 business days) is offered at $85.00+.
  • 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 YJ
Type Accessories
Added 2023-05-22
Gross Weight 2g

Customer Reviews

Based on 4 reviews
Evan W. (United States)

Such a good idea to sell these. I have bought around 12 of these core pieces this year through requesting spare parts. Because of the MGC squan core issue, it has made buying these things necessary since they can break every couple weeks if you’re unlucky. It’s great to see these finally being put on the site, and hopefully this issue will be fixed by YJ soon!


Nice that they have replacements

Trevin D. (United States)
Just as expected

A most of the other people buying this part, my core broke. This is the part that is most likely to break and it’s cheap. If you have a broken core, buy this

BHUVANESH G. (The Netherlands)
It breaks itself

It gets the job done, but it is just as fragile as the initial SQ-1 Core Piece. I wish that they made it from a different type of material.