This Tamiya Grand Hauler kit includes King parts tree B and is perfect for those looking to customize their Tamiya Semi in 1:14 scale. The kit is made by a trusted brand and is compatible with Tamiya Semi vehicles. This is a great addition to any collection of RC Model Vehicle Parts & Accessories. The Tamiya Grand Hauler is sure to impress and provide hours of fun for those who enjoy radio control and control line toys.