Caster Blocks: Traxxas aluminum caster blocks for Jato add both strength and beauty. They are machined from tough 6061-T6 aluminum for superior durability, and then finished in brilliant titanium anodizing for a serious, high-tech performance look. The neutral titanium anodizing color will match well with other colors and aftermarket components on the model. They are available in 25-degree or 30-degree pairs. The 30-degree caster blocks are replacements for the stock Jato caster blocks. The 25-degree aluminum caster blocks can be used to increase stability and make Jato easier to drive on ovals and other long, fast tracks. The caster blocks are marked with a 25 or 30 for easy identification. The aluminum caster blocks require the matching composite steering blocks part 5532 (30-degree) or part 5536 (25-degree). The aluminum steering blocks (part 5536R) may be used with either aluminum caster block set.