... ,Z ,RS,OPEN (metal or nylon)4.Colour: natural color, green, orange, blue, grey, milky white, porcelain white etcProduct Series:60 ... own our brand name YCZCO.Our factory: Yuancheng bearing Co.,Ltd is founded in 2004,which is located in Fuan city ... the professional technology-intensive industry, which is mainly produce miniature deep groove ball bearing or carbon steel, bearing steel, stainless steel ...