基本尺寸			型号
			Model
d[mm]	D[mm]	B[mm]
25mm	32mm	12mm	BK2512
30mm	37mm	12mm	BK3012
35mm	42mm	12mm	BK3512
40mm	47mm	12mm	BK4012
16mm	22mm	16mm	BK1616
18mm	24mm	16mm	BK1816
20mm	26mm	16mm	BK2016
22mm	28mm	16mm	BK2216
50mm	58mm	20mm	BK5020
55mm	63mm	20mm	BK5520
60mm	68mm	20mm	BK6020
9mm	13mm	12mm	BK0912
10mm	14mm	12mm	BK1012
25mm	32mm	20mm	BK2520
28mm	35mm	20mm	BK2820
30mm	37mm	20mm	BK3020
35mm	42mm	20mm	BK3520
40mm	47mm	20mm	BK4020
45mm	52mm	20mm	BK4520
12mm	22mm	32mm	LB122232
16mm	26mm	36mm	LB162636
25mm	40mm	58mm	LB254058
30mm	47mm	68mm	LB304768
35mm	52mm	70mm	LB355270
40mm	62mm	80mm	LB406280
50mm	75mm	100mm	LB5075100
12mm	22mm	32mm	LB122232AJ
16mm	26mm	36mm	LB162636AJ
25mm	40mm	58mm	LB254058AJ
30mm	47mm	68mm	LB304768AJ