![Dragon Door on Twitter: "Group photo from this weekend's NYC RKC-II with Dan John! Are you ready to take your kettlebell certification to the next level? https://t.co/lT8zJ1oH4S #advancedkettlebellcertification #kettlebellcertification #DanJohn #RKC #RKC2 Dragon Door on Twitter: "Group photo from this weekend's NYC RKC-II with Dan John! Are you ready to take your kettlebell certification to the next level? https://t.co/lT8zJ1oH4S #advancedkettlebellcertification #kettlebellcertification #DanJohn #RKC #RKC2](https://pbs.twimg.com/media/FNx2haLXwAcbLiI.jpg)
Dragon Door on Twitter: "Group photo from this weekend's NYC RKC-II with Dan John! Are you ready to take your kettlebell certification to the next level? https://t.co/lT8zJ1oH4S #advancedkettlebellcertification #kettlebellcertification #DanJohn #RKC #RKC2
![RKC Russian Kettlebell - (18 lbs - 8 kg) (Dragon Door) : Kettlebell Weights : Sports & Outdoors - Amazon.com RKC Russian Kettlebell - (18 lbs - 8 kg) (Dragon Door) : Kettlebell Weights : Sports & Outdoors - Amazon.com](https://m.media-amazon.com/images/I/419vD-qhlwL._AC_UF1000,1000_QL80_.jpg)