• Weight: 4 oz. 

• Width: 5" 

• Length: 13 5/16" 

• Area: 37 sq. ft. 

• Top Style: 2 3/8" Open 

• Bottom Style: 2 3/8" Open 

The Unicel C-5635 R Compatible Pool & Spa Replacement Filter Cartridge is a spa or pool filter cartridge for the Jacuzzi CFR 37. Filbur FC-1437 is a compatible replacement filter. These pool or spa filters are tightly-pleated polyester and contain a PVC-enforced open core from top to bottom measuring 2 3/8 inches in diameter. Pool filters promote water health by removing unwanted debris during filter cycles. The FC-1437 swimming pool filters are able to replace the following manufacturer part numbers: Jacuzzi 42-3533-00-R, Unicel C-5635, Pleatco PJ37-IN-4, and Aladdin 13702.