Lifetime warranty Seares Seadamp Evo hydraulic mooring shock absorber with high resistance Stainless Steel spring and cover and hard Anodized Aluminum carter. The internal spring immersed in the 100% biodegradable hydraulic fluid guarantees absolute silence and progressive damping that reduces oscillation avoiding the classic squeak. Complete with integrated anodic protection to prevent corrosion. Extremely light, it weighs only 3 kg. Optional pure Silicone cover for an ideal protection from any impact.