Thunder Tiger PD1863 Lite Pillow Balls EB4 S3 ST-1 ER-1 Optional PartThe Thunder Tiger PD1863 Lite Pillow Balls are optional parts designed for 1: 8 scale RC model vehicles, specifically cars, trucks, and motorcycles. These steering linkage pillow balls are compatible with Thunder Tiger vehicles and can be used with electric, nitro, and glow fuel models. Made in China, these pillow balls provide a smoother and more precise steering experience for RC enthusiasts looking to enhance their vehicle's performance on the