Let’s suppose you have an Astrojax and you want to give it a fresher look or you don’t have an Astrojax but you desperately want to build your own one. Astrojax Tuning Kit is what you need in both cases! The two extra balls are great for tuning with your existing Astrojax. Use the V-Max Tuning Kit in unlimited ways! Tune the orange and purple V-Max balls with your existing V-Max, Plus, or light-up Saturn Astrojax. Tune the shells with halves of other V-Max, Imagine, or Saturn's. Tune three kits together to create an all orange or all purple Astrojax V-Max. Endless combinations await you! Astrojax V-Max Tuning Kit includes: - One clear orange V-Max ball - One clear purple V-Max ball - Two pins - Three strings (blue, grey, & neon day glow yellow) - Pin Popper Note: One Tuning Kit does not give you the opportunity to build a complete Astrojax set. You must buy at least two sets in order to get all the parts that you need.