Details: 100% Brand New Items, Never Used Or Installed High quality Proper alignment, positioning and spacing for faster, easier installation Designed to meet or exceed specifications in form, fit and function High quality components and materials Superior performance and reliability Feature: High-quality material: It is made of high-strength metal material, which is wear-resistant, corrosion-resistant and high temperature-resistant, and has a longer service life. Stability performance: It can keep the drive belt or chain tight, reduce slack and jumping teeth phenomenon, make the engine and other mechanical parts run more smoothly and reliably. .