Duncan Toys 14.5mm I.D SG Stickers, [4-Pack] Yo-Yo Silicone Groove Response Pads

The Duncan Light Up (LED) Yo-Yo Counterweight emits a brightly glowing light when released, attracting lots of attention and breaking the rules of conventional yo-yoing! Attach the counterweight to favorite yo-yos to perform amazing tricks in the dark! The counterweight comes with a long-life (non-replaceable) battery installed.; From the Manufacturer; Introducing the Duncan Light Up Counterweight featuring dual light emitting LED's that produce a bright blue glow. Power is activated/activated with the press of a button. Perfectly weighted for counter-weight play.