SPGO Piston Seal Fits Excavator

It is worth noting that the SPGO Seal, a kind of custom oil seals, is designed to minimize friction during operation, which reduces wear and extends the life of the seal. It also operates smoothly and quietly, preventing any noise that could interfere with the operator's ability to focus on the task at hand.
https://www.sanpingmachinery.com/products/spgo-piston-seal/