• Derailleur brands: DNP
• Country: Taiwan
• Date of introduction: 2016?
• Date of this example: unknown
• Model no.: 1900
• Weight: 295g
• Maximum cog: 32 teeth (this is widely quoted but I can't find an 'official' source)
• Total capacity: unknown
• Pulley centre to centre: 100mm
• 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

Ref. 1571