For use with T-REX450X/XL Specifications:●Control Lever Set x 2●Bearing(MR52ZZ) x 4(Φ2xΦ5x2.5mm)●Linkage ball x 4(Φ4.75x4.59mm)●Socket screw x 4(M2x6.5)●Collar screw x 2(M2x12)●Washer x 4(Φ2xΦ3.8x0.2mm)