Instructions Utilizes dual point attachment design for zero play and higher precision control feel. Constructed with CNC aluminum alloy, with precision ball bearing at moving points, improving structure rigidity and smoothness, allowing rudder control to be more precise and smooth. 6061-T6 Aluminum alloy material and CNC processed. Use for T-REX 600ESP. Specifications: I-shaped Arm × 1 Mount Link × 1 Metal plate(R) × 1 Bearing MR105ZZ × 1(Φ5xΦ10x4mm) Bearing holder × 1(13.5x12.5x9.5mm ) Linkage ball A(M2x3.5) × 1(Φ4.75x8.18mm) Tail control arm × 1 Bearing mount washer × 1(Φ7x Φ8.3x3.5mm) Bearing F682XZZ × 6(Φ2.5xΦ7.1xΦ2.6mm) Bearing MR117ZZ × 2(Φ7xΦ11xΦ3mm) Socket button head screw × 1(M3x5mm) Socket button head screw × 6(M2.5x5mm)