The AquaTune Waterco Opal / Paramount / or Theraclear 225 replacement filter cartridge has 225sq ft of Reemay filter media and is made by Magnum Filters in New Zealand for Aquatune.
Manufactured from quality Cartridge Element Media which is made of continuous filaments and does not weave out, heavier and sturdier making it better at capturing smaller particles to 10 microns. It has a Length of 540mm, a Diameter of 225mm and a hole of 75mm.