●Use for T-REX 250.

Specification:
●Shaft x 1(Φ2xΦ2.6x18.6mm)
●Metal pulley cover x 2(Φ1.7xΦ6x2.25mm)
●Metal drive pulley(16T) x 1(Φ1.7xΦ4.74x2.4mm)
●Bearing MR52ZZ x 2(Φ2xΦ5x2.5mm)
●Screw x 1(M1.2x3mm)