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O-ring sealed high-pressure piston design can prevent excessive grease overflow, its sealing is far greater than ordinary grease gun. On the left is the air intake, which is intake when the T-pole is extended. On the right is the air outlet, you can tap out the excess air. The thickened spring can make the maximum pressure of the oil injection gun reach 8000psi, helping the user to complete the work better under the drive of super strong pressure.






