DW-50-20-F-S-820 DW-50-20-F-S-825 DW-50-20-F-S-826 DW-50-20-F-S-830 DW-50-20-F-S-835 DW-50-20-F-S-840 DW-50-20-F-S-845 DW-50-20-F-S-850 DW-50-20-F-S-853 DW-50-20-F-S-855