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Acekeeps Steel (1/8 inch) to 5mm Pinion Reducer Sleeve for Converting RC Motor Pinion Gears, Set of 3
RC motor shaft for Converting RC Motor Pinion Gears Made of Steel Inner Dia. inch), Out Dia. 5mm, Length 12mm Makes 5mm pinion gear work on a 3mm (1/8 inch) shaft motor Convert 1/8 Gears to 1/10 motors, fit 1/10 RC Scale Vehicle Boat Plane Package Included 3 Pieces Dimensions 2.99 x 2.48 x 0.16 inches, Weight 0.317 ounces, model number Manufacturer recommended age 14 years and up, Rank Toys & Games RC Vehicle Transmission Gears 

Price is $8.00

Price: $7.98