Upgrade the steering system of your 1/18 TRX-4M crawler with these high-quality brass caster blocks from COOWOO. Designed to replace the original plastic parts, these caster blocks are more durable and wear-resistant, providing improved performance and longevity. The high-precision CNC machining ensures a direct fit and easy installation, while the custom and attractive appearance adds a personalized touch to your crawler. Each set includes left and right caster blocks, as well as 4g/pcs front counterweight to improve anti-rollover stability and crawling capability. Trust COOWOO to provide you with reliable and high-performance upgrade parts for your 1/18 TRX-4M crawler.