Silver series miniature mounted units are made of high strength Zinc alloy which gives higher mechanical perfomace and light propertities to the whole units. Silver series could be equipped with rubber shrouded metal covers, close and open type. Size range: A) Eceentric locking collar type: UP/UFL 000-006 B) Locking collar type: KP/KFL000-006 C) Insert: U000-U006 & K000-006 Trademark: SZR Model No.: UP/UFL000-006, KP/FL000-006 Company: Xinhengyi Bearing Co., Ltd.