This is the complete internal assembly for the Jacuzzi Tri-Clops TC-440 cartridge filter. This complete internal assembly will replace the older assembly used in the TC-450 filter. This assembly includes all the internal parts needed to convert an older TC-450 to the newer style TC-440. This is a new, OEM Jacuzzi part, number: 42-3702-15-K. Kit Includes (3) Round 147 SQFT Filter Cartridge (3) Cartridge Support (1) Bottom Manifold, part number 442-3799-10-R (1) Manifold O-Ring, part number 47-0212-66-R (O-69) (1) 2-1/4" O-Ring, part number: O-64