Keep the sparks flying! Now you will never have to worry about running out of sparks when riding your Razor Jetts Heel Wheels. This replacement packs includes four replacement cartridges, so you can keep on sparking up your ride! 
Razor Jetts Heal Wheels Spark Replacement Pack:

• 4 Razor Jetts replacement cartridges
• High-performance materials for ultimate sparking
• Fits into the bottom of Razor Jetts
• Sparks when you push down your heel
• Replacement pack ONLY Razor Jetts Heal Wheels not included!