Water Tech P30X049 Brushes for Vacuum Head 6 Pack - This 6 pack of brushes is for use with pool vacuum heads. They are compatible with heads for the following pool vacuums: Max, Max Li Max Li CG, Max HD, Max Li HD, Catfish Ultra, Catfish Li Ultra, Centennial, Centennial Li, IVAC 350, IVAC 350 Li, Millennium and Millennium Li. Pool vacuum heads and pool vacuums are sold separately. Please see your pool vacuum's manual to ensure you are using the proper replacement part.