The INA SD15X21X3 is a Ball Bearing Units, with a bore diameter (d) of 15 mm, an outer diameter (D) of 21 mm and a width (B) of 3 mm. Supplied by Wuxi Andge Bearing Co., Ltd. (AndgeBearing), a bearing manufacturer and exporter based in Wuxi, Jiangsu, China — OEM and custom bearings welcome, RFQ replied within 30 minutes on working days.