任何系列之"一寸軌道"均可使用~專利上檔+PVC=升級"超靜音"
Use for any series of "3cm Track"~patent up-stopper + PVC = upgrade "Super Silence".
Y.G.S series of product (made in Taiwan)--heavy-duty pulley (Japan Bearing)--combination bottom is made of brass, which ensure to bear more than 100KG weight.