This is a 444 (Black x Silver) from YoYoFactory. It hasn't been used much, but it's been several years since I bought it, so the O-ring on one side of the hubstack has deteriorated and broken due to aging, making one side of the hubstack unusable. I think you can buy O-rings at a home center, etc., so you can use the hubstack if you replace them. It has been upgraded with a titanium axle and curved bearing. A K-String normal yellow string will be included. I have lost the original packaging, so it will be shipped in an old YYF package. Please note that it may be out of stock due to time differences, as it is also listed on other sites.