Fiche Technique Differential Ring Gear W/ Pinion Gear For 1/18 Wltoys A959 A969 A979 K929 Specifications Material:Steel Color:Black Big gear diameter:28mm Small gear diameter:12mm Feature Made of high quality plastic, thick material, light weight, durable precision, long service life. High quality motor parts For 1/18 Wltoys A959 A969 A979 K929…