Yiguo Metal Diff Main Gear & Motor Gear for 1/18 WLtoys A949 A959 A969 A979 K929 Upgrade Parts Sliver Set of 2 Part No.: A580029/A580038 Suitable for WL toys 1/18 A949 A959 A969 A979 K929 Material: Metal Package Content: 1pc Diff Main Gear + 1pc Motor Gear