Product: Package: Instruction: Specification: ●Use for T-REX 500. ●Flybar seesaw holder x 1●Bearing MR83ZZ x 2(Φ3x8x3mm)●Bearing MR74ZZ x 2(Φ4xΦ7x2.5mm)●M3 collar screw x 2(M3x9.6mm)