Spot supply of 31 SY215 excavator rotary two planetary assembly, walking motor two walk assembly (planetary gear, solar gear, planetary gear). Kato 820-3 rotary motor two level assembly toothed ring solar gear, rotary gear reducer gear reducer planetary gear. Plenty of excellent quality, reasonable price, inventory, welcome to call us for consultation, the main machine (contact: Li Dongcheng, mobile phone number: 18964033046, QQ229230650)