Constrution	Size
1X7	0.6mm-7mm
1X19	1mm-10mm
1X37	3mm-16mm
6X7+FE	2mm-16mm
7X7(6X7+SE)	2mm-16mm
6X19+FE	3mm-16mm
7X19	3mm-16mm
6X37+FE	6mm-22mm
7X37IWSC	6mm-22mm