※ SUS＃316 不銹鋼面板及滾珠※ POM塑膠滑輪※ 專門提供 小艇;樂觀型帆船;雷射型帆船 等小船使用※ Stainless Steel Ball Bearing provides the good and smooth rotation. ※ Polished 316 L Stainless Steel sideplates give optimal maximum working load.