Manufactured from lightweight durable aluminum and hard wearing steel this set adds strength and durability to the differentials of your model Fits . Arrma Big Rock 3S BLX Arrma Granite 3S BLX Arrma Granite 4x4 Mega Arrma Kraton 4S BLX Arrma Outcast 4S BLX Arrma Senton 3S BLX Arrma Senton 4x4 550 Arrma Senton Mega Arrma Typhon 3S BLX Arrma Typhon 4X4 550 Specifications . Color Black. Material Aluminum