SIZE	A	B	c
1/2"	12	34	76
3/4"	12.5	35	82
1"	D16	39	95
1 1/4"	26	48	120
1 1/2"	29	54	133
2"	36	57	152
2 1/2"	54	77	205
3“	65	80	233
4"	89	80	278