One Drop Side Effects - Ultra Light - Yo-Yo Axle System

One Drop Side Effects are a special adjustable weight axle system. With Side Effects you swap out the hub to adjust the inner weight as well as the aesthetics of your Side Effect compatible yo-yo. All Side Effects are interchangeable! Find the Side Effect that fits your style of play perfectly!
The Aluminum Ultra Lights weighs 2.5 grams (total weight of both sides and axle).