7205CYDUP4 Nachi Angular Ball Bearings High Precision Ball Bearings 25mm x 52mm x 15mm Abec-7 Made in Japan 7205CYDUP4 Nachi high precision Angular pair of Ball Bearings with 15 degrees contact angle and Polyamide resin cage, pair of ball bearings (2 duplex bearings), ABEC-7 (P4) quality and made in Japan, inner diameter is 25mm, outer diameter is 52mm and, width is 15mm.