- High-strength hard rear spring, designed for RC model shock absorbers - Graupner brand, model 90191.118, leader in accessories and spare parts for modeling - Distinctive green color that makes identification and custom adjustment easier - Improves rear suspension, providing greater stability and control on rough terrain - Compatible with a wide range of radio-controlled model kits and vehicles - Made with quality materials for long life and consistent performance - Essential accessory for those looking to optimize their model's performance - Easy installation, ideal for both hobbyists and modeling experts