INTEX 29001E Pack of 4 PureSpa Type S1 Easy-to-Install Pool Cartridges

For maximum efficiency, clean the cartridges weekly and replace them monthly or sooner.

It is made with durable, easy-to-clean Dacron paper for ultimate filtration.

Works with all Intex PureSpa models including 28403E, 28407E, 28443E, 28453E, 28421E, 28423E, 28413E, and 28453E.

Each filter measures 7.6 x 10.2 cm.