Instruction: ˇ´Use for T-REX 450 Pro. Specification: ˇ´347 Tail boom x 2(Φ11xΦ12x347mm) ˇ´Rudder control rod x 1(Φ1.3x330mm) ˇ´Ball link x 2 ˇ´Tail control guide x 2(Φ12.2xΦ14.6x4mm)