DESCRIPTION:
Parker 8700 Series PolyMyte Back-Up Rings are designed as anti-extrusion devices for 8400 and 8500 Series U-Cups. The Parker 51 Dash Series PolyMyte BackUp Rings are designed for O-Rings as anti-extrusion devices. The 8700 Series match nominal inch size and therefore can be used with any seal design where nominal inch dimensions are found.
