This is a Pentair Multiport Valve Stem O-Ring for Star Polymeric D.E. Filters Models ST40, ST50, Top and Side Mount MultiPort Valves. Approximate Measurements: 7/8 Inch ID x 1-1/8 Inch OD x 1/8 Inch Thick .
This o-ring has been manufactured in accordance with OEM specifications and is designed to meet or exceed the original manufacturer specifications.
