K&B Dampener Head Tuning Fits TREX 600N & E; Mikado Log 10,14,500 & 600; They will also fit the Knight 50 with a small washer ( you will get 3 sets as pic show ) ===================================== The head tuning kit gives customers all three sets we offer which are Medium, Hard and Extreme. They go from Mild to really, really wild. The kit allows the customer to try all different sets to tune in the head to his/her type of flying

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