Align replacement metal tail drive gear assembly for the T-REX 500 line of helicopters
Tail drive gear (31T): 4.2x19.8x9mm
Metal pulley cover: 4.4x14.5x4.5mm
Drive pulley (19T): 4.4x6xF11.75x4.15mm
Bearings x2: 4x9x4mm 684ZZ
Review Summary (Based on 2 Reviews)
Great! now I wont be without when I decide to crash my chopper.
Genuine Align, RCPlanet gets the products to you quickly, which is very important to me as there isn't a hobby shop with helicopter supplies for 100 miles.