- Derailleur brands: DNP
- Country: Taiwan
- Date of introduction: 2014?
- Date of this example: unknown
- Model no.: 1900S
- Weight: 255g
- Maximum cog: 28 teeth (I have seen this quoted but I can't find an 'official' source)
- Total capacity: unknown
- Pulley centre to centre: 54mm
- Index compatibility: 9 speed?
- Chain width: 3/32”
- Logic: top normal
- B pivot: sprung
- P pivot: sprung
- Materials: steel pulley cage and parallelogram plates, aluminium B-knuckle and plastic P-knuckle
