Fit hayard perflex expansion cycle Electronic Filter models i_pfppts, ec50c80x5s, ec75a and EC40, EC50, ec50c90 series
Weighs 8-1/2 lbs."
These shoulder screws are designed for use with the Hayward Perflex expansion cycle D.E. Filter Model I_PFPPTS EC50C80X5S EC75A EC40 EC50 EC50C90 Series Weight: 8-1/2 lbs.