Tamiya Options 440 Spec Hard Spring 53440 Hop-Up No. OP.440 On-Road

--------------------------------------------------------------------------------- Sold and shipped by Japanese sellers * Operated by Japanese sellers - Japanese sellers with trust and experience. * Direct from Japan - All items are carefully packed and shipped promptly from Japan. * Highest quality control - Inspected by Japanese standards to ensure high quality products. ---------------------------------------------------------------------------------

Compared to OP163, this is a harder type spring that improves stability during high-speed driving.