Description: Compatibility: This complete metal center differential upgrade kits is suitable for Hoss 4X4 , 4X4 V XL, 4X4, Slash 4X4 , Slash 4 X4 Ultimate, Slash 4x4 , Slash 3 x3 and 3X3 models.Durability: The center differential parts are made of steel, which is more sturdy than stock parts and suitable for high power ESC/motor systems.Enhanced Performance: Steel center differential gear kits help replace the standard clutch in your vehicle with this high performance center differential to absorb drive shaft for improved durability.Heat dissipation: The finned aluminum housing helps dissipate heat, while metal differential gear strong large (54T) and small (32P) steel gears provide maximum durability.Package Included: Central differential assembly*1 + a gear each of size 15T+17T+19T. Specification: Material: Steel Size Chart: 4.47cmx7.6cm/1.76inchx2.99inch Package Includes: 1?Set Central Differential Kits1 Piece 15T Gear Component1 Piece 17T Gear Component1 Piece 19T Gear Component Note: Please allow slightly errors 1-2cm differences due to manual measurement.