EPAn o-ring is a simple and versatile ring-shaped packing or sealing device with a circular cross section, from which the "O" in its name is derived.  O-rings function as compact and reliable sealing devices by absorbing the tolerance stack-up between closely mated surfaces in both dynamic (moving) and static (stationary) applications.

An oring seals by blocking any potential leak path of a fluid (liquid or gas) between two closely spaced surfaces. The oring is generally installed in a machined groove in one of the surfaces to be sealed. As the two surfaces are brought together, forming a gland, they squeeze the cross section of the o-ring.

O-rings can be produced by mold press or cutting to small piece by cutting from rubber tubing.Any colours are available .