We sell only genuine Armstrong ® parts.
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This is an authentic manufacturer-sourced replacement part which is specially designed for use with Armstrong Flo-Trex Valves. It helps to provide an air-tight seal between the components, please make sure to refer to the appropriate diagrams of your model for the correct location and application of this hardware. Note that over time the material may wear out and begin to crack eventually requiring a replacement. Keep in mind this high-quality item is made of durable rubber and is sold individually.