Model No.	D	D1	E	A	B	C
BF-10	12/14/15	8	10	7.6	0.9	7.9
BF-12	14/15/16	10	11	9.6	1.15	9.15
BF-15	18/20	15	13	14.3	1.15	10.15
BF-17	20/25	17	16	16.2	1.15	13.15
BF-20	25/28/30	20	16	19	1.35	13.35
BF-25	30/32/36	25	20	23.9	1.35	16.35
BF-30	36/40	30	21	28.6	1.75	17.75
BF-35	40/45	35	22	33	1.75	18.75
BF-40	50	40	23	38	1.95	19.95