DF1B-2s-2 DF1B-2S-2.5C DF1B-2S-2.5R DF1B-2S-2.5R(11) DF1B-2S-2.5R(16) DF1B-2S-2.5RC DF1B30DEP2.5RC DF1B-30DEP-2.5RC DF1B-30DEP-2.5RO DF1B-30DEP-25RC