1057480 Boom Cylinder Seal fits Caterpillar 307B 307 

• Fits Caterpillar Cylinders
• #307 Boom Cylinder# 1057468
• #307 Boom Cylinder# 1239937
• #307 Offset Cylinder# 1239937
• #307B Offset Cylinder# 1239937
• Includes Wiper, U cup, Buffer and 4 pc T Piston seals
• 55mm Rod x 100mm Bore
• After market seal kit for Caterpillar equipment