Shop › KST Servo Set - F5L Image 1 of 1 KST Servo Set - F5L $179.00 Sold Out KST servo set for the X-Flow F5L, includes 2x A06, and 2x A06H servos. Sold Out Added! KST servo set for the X-Flow F5L, includes 2x A06, and 2x A06H servos.