25 sq ft replacement filter cartridge designed to fit many Rainbow, Waterway, and compatible spa systems.

Made with high-quality Reemay® spunbond polyester media for dependable filtration and long-lasting performance.

Open top and bottom (2-1/8" inner diameter) allow easy drop-in installation in standard canister systems.

Measures 13-5/16" in length with a 4-15/16" outer diameter for a precise fit.

Effectively captures fine debris, oils, and sediments to maintain crystal-clear spa water.

Helps extend the life of spa equipment by keeping contaminants out of the plumbing and jets.

Designed for easy weekly rinsing and monthly deep cleaning; replace every 12 months or as needed.

Manufactured by Unicel®, a leader in spa and pool filtration products.