This is the complete internal assembly for the Jacuzzi Tri-Clops TC-330 cartridge filter. This complete internal assembly will replace the older assembly used in the TC-300 filter. This assembly includes all the internal parts needed to convert an older TC-300 to the newer style TC-330. This is a new, OEM Jacuzzi part, number: 42-3702-10-K. Assembly Includes (3) 110 SQFT Round Filter Cartridges (3) Cartridge Supports (1) Bottom Manifold, Part # 442-3799-10-R