2765739 Blade Seal Kit fits Caterpillar 303.5 

•  Fits Caterpillar Cylinders
• #303.5 Blade Cylinder#1636935
• Serial#AFW1-UP;DCH1-UP
• 50mm Rod x 90mm Bore
• Includes Wiper, U Cup and Piston seals
• After market seal kit for Caterpillar equipment