4I8913 Stick Boom Cylinder Seal Kit fits Caterpillar 311 312

•  Fits Caterpillar Cylinders 
• #311 Stick Cylinder#1251549,418842
• #312 Boom Cylinder#1251545,418838
• 75mm Rod X 110mm Bore 
• Includes Wiper, U cup, Buffer and Piston Seal
• After market seal kit for Caterpillar equipment