基本尺寸			型号
			Model
d[mm]	D[mm]	B[mm]
20mm	26mm	12mm	BK2012
22mm	28mm	12mm	BK2212
18mm	24mm	16mm	BK1816
20mm	26mm	16mm	BK2016
0mm	23mm	20mm	NK15/20
12mm	24mm	16mm	NK16/16
12mm	24mm	20mm	NK16/20
0mm	25mm	16mm	NK17/16
0mm	25mm	20mm	NK17/20
0mm	26mm	16mm	NK18/16
0mm	26mm	20mm	NK18/20
15mm	27mm	16mm	NK19/16
15mm	27mm	20mm	NK19/20
0mm	28mm	16mm	NK20/16
0mm	28mm	20mm	NK20/20
17mm	29mm	16mm	NK21/16
17mm	29mm	20mm	NK21/20
0mm	30mm	16mm	NK22/16
0mm	30mm	20mm	NK22/20
20mm	32mm	16mm	NK24/16
20mm	32mm	20mm	NK24/20
0mm	33mm	16mm	NK25/16
0mm	33mm	20mm	NK25/20
22mm	34mm	16mm	NK26/16
160mm	200mm	40mm	NA4832
170mm	215mm	45mm	NA4834
180mm	225mm	45mm	NA4836
190mm	240mm	50mm	NA4838
200mm	250mm	50mm	NA4840
220mm	270mm	50mm	NA4844