Drive system parts for Tamiya Mini 4WD (gear bag set). These are repair and spare parts. Also suitable for sorting and selection. There are 19 sets. If you would like more, please let me know in the comments, and I will look for them. There are 14 sets for single-shaft motors and 5 sets for double-shaft motors. If purchased from customer service, according to the assembly instructions, the price is 600 yen for single-shaft and over 700 yen for double-shaft. (These prices include the metal fittings set + gear bag set, and the metal fittings, gear set + motor, respectively) I think this is a good deal. Thank you for your consideration.