120 Series IMO Part No.

Part Number	Outside diameter outer ring(Da)	Inside diameter inner ring(di)	inside diameter outer ring(Di)	Outside diameter inner ring (da)	Weight(G)
11-20 0311/1-32102	15.9	7.5	12.421	12.303	51
10-20 0311/0-32002	17	7.5	12.421	12.303	46
12-20 0311/1-32202	17	8.35	12.421	12.303	49
11-20 0413/1-32112	19.9	12	16.437	16.319	71
10-20 0413/0-32012	20.4	12	16.437	16.319	64
12-20 0413/1-32212	20.4	12.85	16.437	16.319	68
11-20 0541/1-32122	25.15	17	21.476	21.358	95
10-20 0541/0-32022	25.5	17	21.476	21.358	82
12-20 0541/1-32222	25.5	17.6	21.476	21.358	95
11-20 0641/1-32132	29.15	21	25.413	25.295	115
10-20 0641/0-32032	29.5	21	25.413	25.295	97
12-20 0641/1-32232	29.5	21.6	25.413	25.295	110
11-20 0741/1-32142	32.9	25	29.350	29.232	128
10-20 0741/0-32042	33.4	25	29.350	29.232	115
12-20 0741/1-32242	33.4	25.6	29.350	29.232	126
11-20 0841/1-32152	37.2	28.83	33.287	33.169	157
10-20 0841/0-32052	37.4	28.83	33.287	33.169	130
12-20 0841/1-32252	37.4	29.133	33.287	33.169	152
11-20 0941/1-32162	41.2	32.83	37.224	37.106	170
10-20 0941/0-32062	41.25	32.83	37.224	37.106	146
12-20 0941/1-32262	41.25	33.133	37.224	37.106	165
11-20 1091/1-32172	46.867	38.75	43.130	43.012	198
10-20 1091/0-32072	47.18	38.75	43.130	43.012	170
12-20 1091/1-32272	47.18	39.133	43.130	43.012	201