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The U3 Sparkle is a titanium (Gr5 / TC4) yo-yo with a V-shaped size C bearing seat and an 8mm SUS304 axle, per the Vosun official site.
Folio 4346
The U3 Sparkle is a titanium (Gr5 / TC4) yo-yo with a V-shaped size C bearing seat and an 8mm SUS304 axle, per the Vosun official site.