●500X Belt Pulley Mount(12.5x8.5x12mm) x 2
●500X Belt Pulley(Φ4.5xΦ8x7.2mm) x 2
●500X Belt Pulley Spring(Φ4xΦ5.2x15mm) x 2
●Bearing 681ZZ-D2(Φ2xΦ4.5x2mm) x 4
●Socket Botton Head Screw(M2x8mm) x 2