Paramount Opal / Waterco Opal 180 / Theraclear 135 701038 replacement filter cartridge. Has a flat top and bottom with a open hole at each end. These are not the cheap poor quality filters found elsewhere. Made from Darlly / Reemay / Magnum material.
Filter dimensions:
- Height: 430mm(end to end)
- Width: 255-260mm
- Hole ID: 75mm