ZD50×80×18 Double Spring Combined Skeleton Oil Seal Rectangular Structure For Loader & Mini Wheel Loader Gearbox Transmission Replacement Seal Describe: This ZD-type double spring combined skeleton oil seal features a stable rectangular cross-section structure, professionally customized for gearbox and transmission systems of loaders and mini wheel loaders. Equipped with dual tension springs and integrated metal skeleton reinforcement, it solves common faults such as gear oil