High Precision Ball Bearings 7210CTYN DBD (3 set) Nachi Angular Ball Bearings 15 degrees Contact Angle Abec-7 50mm x 90mm x 20mm Made in Japan 7210CTYN DBD (3 set) Nachi high precision Angular pair of Ball Bearings with 15 degrees contact angle and Polyamide resin cage, pair of ball bearings is 2 duplex bearings, bearings are ABEC-7 (P4) quality and made in Japan.