MPV Spider Gasket 40mm, suits Hayward SP710, Quiptron, Paramount, FPI, Waterco pre-1992
Non-genuine (but as good as any you'll get)
Remember, to extend the life of your gaskets & seals always use silicone lubricant, not vaseline. Rotate the MPV handle in one direction only to avoid slippage or stretching.
Diameter 138mm
Silicone Lubricant available here