Track rollers with profiled outer ring LFR..-2Z
locating bearing track rollers, double row, gap seals on both sides

LFR50/5-4-2Z	5	16	8
LFR50/5-6-2Z	5	17	8
LFR50/8-6-2Z	8	24	11
LFR5201-10-2Z	12	35	15,9
LFR5301-10-2Z	12	42	19
LFR5201-12-2Z	12	35	15,9
LFR5302-10-2Z	15	47	19
LFR5204-16-2Z	20	52	22,6
LFR5206-20-2Z	25	72	25,8
LFR5206-25-2Z	25	72	25,8
LFR5207-30-2Z	30	80	29
LFR5208-40-2Z	40	98	38
LFR5308-50-2Z	40	110	46

sumber:
http://medias.schaeffler.com/medias/en!hp.ec.br/LFR..-2Z_LINEAR?#LFR..-2Z_LINEAR