12BC03SZ-2NK Nachi Two Non Contact Seals Bearing 12mm x 32mm x 10mm Made in Japan 12BC03SZ-2NK Nachi Two Non Contact Seals Bearing, Made in Japan, here are the dimensions of the 12BC03SZ-2NK, the 12BC03SZ-2NK inner diameter is 12mm, the 12BC03SZ-2NK outer diameter is 32mm, 12BC03SZ-2NK width is 10mm.