Unidentified spherical puzzle

[anonexistentuser]

A friend of mine has a spherical puzzle with no brand markings on it, outside or inside. It has four circles arranged with red opposite blue and green opposite yellow; there is a hole for a keychain on one piece. Thanks in advance!

 

[PatrickJameson]

This? (Picture of mine. Just not a keychain version).

Spoiler

http://www.mefferts.com/products/details.php?lang=en&category=17&id=145

 

[anonexistentuser]

That's it! Thank you!