Includes 1 crank and 2 pedal extensions, but does not include an additional armature. Fit for VTUVIA SJ26 & SF20 & SK20 & SX20 & SN100 (without UL) & Old-SF20H (without UL) Models. Fit for SN100 UL Version. They are not universal, p lease choose the correct model before purchasing. ONLY suitable for our VTUVIA E-Bikes, return, refund and exchange are NOT acceptable.