This is the Gearbox 5.5:1 Ratio 1.2mm Output Shaft Type C For the Flyzone Nieuport 17 WWI Micro EP Biplane FEATURES: This gearbox is needed for the brushed motor on the Nieuport 17. INCLUDES: Two gearboxes REQUIRES: Flyzone Motor Brushed 7mm 12000 Kv Type A (FLZA6102) COMMENTS: This gearbox is a replacement part for Nieuport 17 WWI Micro EP RTF 15.3" (FLZA2040) Nieuport 17 WWI Micro EP Tx-R 15.3" (FLZA2042) 9/19/12 phijwa