[Compatible with]: 43T main gear & 10T main input gear are upgrades for 6S, 1/7 FIRETEAM 6S (#ARA7618);1/7 6S & roller (#ARA7204, #ARA106058, #ARA7604V2);1/8 KRATON 6S & Roller (#ARA106053, ARA106040, ARA8608V5);1/8 NOTORIOUS 6S (#ARA106044, ARA8611V5); 1/8 OUTCAST 6S (#ARA106060, ARA106042, ARA8710); 1/8 TALION 6S (#ARA106048, ARA8707).Replacement for #ARA310980 #ARA310979. [Spec]:The all-inclusive kit contains 1pcs main gear 43T spiral GP4 5mm; 1pcs main input gear 10t spiral cut GP4 5mm. Note that too much violent speed affect the life of the product. [FEATURES]:Machined from tough steel for long-lasting durability and consistent performance - Spiral-cut, wide tooth profile increases twist handling capabilities - manufactured gear teeth for smooth operation in extreme RC conditions - GP4 configuration to be used with GP4 Main Input Gear - Fits on 29mm Case [ & CNC Machining]: Hard-anodized colour, CNC machined PTFE-coated Metal; The Metal material is and improves the overall performance of the Gear set ; from the great looks, Metal not flex as much as plastic under stress or during high ambient temperatures. Colour:black Material:Metal Package Contents: 4 x RC Car Gear 43T 4 x RC Car Input Gear 10T Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.