【Adaption】The front axle seals and U joint kit is Compatible with Ford F250 F350 F450 F550 Super Duty（Dana Super 60 axles） 1998-2004 【Material】The Front Axle U Joints and Oil Seal O Ring kit is made of steel and rubber, treated with high-temperature resistance and anti-corrosion, sturdy and durable 【Function】The tube seal kit is used for the outer axle shaft seal to prevent dirt from entering and replace the old and worn seals, and replace the old or damaged u joint kit 【Package Include】2 U-joint kit, 2 updated outer tube dust seals, 2 inner knuckle seal, 2 O-ring and 8 clips(total 16 pieces). The replacement OE/OEM part numbers are SPL55-3x/25-332X , 50381/710413, 50491/28600/710493, 41784-2/F81Z-4A322-AA, Please check the quantity carefully after receiving the product 【Install】Product installation requires corresponding knowledge，Independent installation Please refer to the installation video to avoid errors. It is recommended to have a Professional people install it to save time and effort Package Include: 2 * Inner Knuckle Seal Or Vacuum Seals 2 * Up Dated Outer Tube Or Dust Seals 8 * Seals Press Into The Out Side End Of The Axle Housing Tube 2 * Wheel Hub Bearing O Rings 2 * U Joints