6201-2NK Nachi Two Non Contact Seals Ball Bearing 12mm x 32mm x 10mm Made in Japan 6201-2NK Nachi Two Non Contact Seals Ball Bearing, Made in Japan, here are the dimensions of the 6201-2NK, the 6201-2NK inner diameter is 12mm, the 6201-2NK outer diameter is 32mm, 6201-2NK width is 10mm.