This spring sleeve serves as a key rubber buffer component for truck chassis suspension. Installed between the front axle and leaf spring, it absorbs road vibration and mitigates impact during driving. Made with premium rubber compound, it delivers excellent elasticity, aging resistance and compression resistance. It effectively cushions bumps and reduces friction noise between metal parts. The embedded metal sleeve boosts structural strength and prevents extrusion deformation under heavy loads. Each spring sleeve passes compression and aging tests before delivery. It resolves chassis abnormal noise and rubber cracking issues, and it is a consumable replacement part for truck chassis maintenance.