Shop › KST Servo Set - F3L Image 1 of 1 KST Servo Set - F3L $179.00 Sold Out KST servo set for the X-Flow F3L, including 2x A06H, and 2x A08H servos. Sold Out Added! KST servo set for the X-Flow F3L, including 2x A06H, and 2x A08H servos.