Water Balloon Self Sealing Tying Refill Kit 500 Balloons and Self Sealing Rings Balloon Monsoon's Self Sealing Water Balloon REFILL Kit includes 500 Biodegradable Water Balloons and 500 Self Tying Rings. And can be used with any quick filling no tie water balloon system (not included). Does not include a "tool" like some refill kits because the use of a tool causes the O-rings to stretch out, causing the balloons not to seal. This kit is just as easy to use and the balloons seal better! Simply reuse your quick filling hose system and put a Balloon Monsoon water balloon on each straw and push balloon on straw till the straw is to the top of the balloon. Then roll the ring onto the straw and down the the tail of the balloon (about 1/4" from the bottom of balloon). Then push the balloon up so that the oring is about 1/4" from the end of the straw. Repeat with each balloon. Fill as instructed with the balloon system. Tons of water balloon fun with a fraction of the work of traditional filling and tying water balloons. Save time and money. No need to re-buy the complete systems. Just re-use your Balloon Monsoon filling wand systems and easily refill! The Balloon Monsoon balloon filling wand system can be found by searching B011PVSWZ2 or Balloon Monsoon.