It is a brass weight of 1mm thick. The size fits perfectly in Li-Po battery of 2S size 46.5 �� 137mm. Weight is 53g. It is most suitable for Li-Po lightweight. the weight adjustment of Li-Fe battery is used. I can expect the improved stability at low center of gravity. It is also effective for high-side measures in the ultra-high-grip road surface.
(SK53S. SK53M. SK53F. SK53R recommended) is recommended thin double-sided tape affixed to the chassis. In addition. in combination with SK70 battery pad Zerosuri is recommended. too.