Model Inner Diameter (mm) Outer Diameter (mm) Thickness (mm) N202EM 15 35 11 NU202EM 15 35 11 NJ202EM 15 35 11 N203EM 17 40 12 NU203EM 17 40 12 NJ203EM 17 40 12 N204EM 20 47 14 NU204EM 20 47 14 NJ204EM 20 47 14 N205EM 25 52 15 NU205EM 25 52 15 NJ205EM 25 52 15 N206EM 30 62 16 NU206EM 30 62 16 NJ206EM 30 62 16 N207EM 35 72 17 NU207EM 35 72 17 NJ207EM 35 72 17 N208EM 40 80 18 NU208EM 40 80 18 NJ208EM 40 80 18 N209EM 45 85 29 NU209EM 45 85 19 NJ209EM 45 85 19 N210EM 50 90 20 NU210EM 50 90 20 NJ210EM 50 90 20 N211EM 55 100 28 NU211EM 55 100 21 NJ211EM 55 100 21 NU212EM 60 110 28 NJ212EM 60 110 28 NU213EM 65 120 23 NJ213EM 65 120 23 NU214EM 70 125 24 NJ214EM 70 125 24 NU215EM 75 130 25 NJ215EM 75 130 25 NU216EM 80 140 26 NJ216EM 80 140 26