338mm L x 126mm D Rising Dragon Top Load Polyspun Disposable filter cartridge

suits Rising Dragon Top load and floating weir filters.

Polyspun disposable 338mm H x 126mm OD x 55mm ID

Used on Arctic Spas and others. Fits many common filter housings

Suits Waterway top load/in-line, Waterco top load, Rainbow RDC/ RTL filters - also some Chinese made filters 50 sqft filtration
By far the most common cartridge size in use on the vast majority of spas dating back 15+ years Practically every spa brand has or does use this cartridge.

Polyspun disposable filters are designed to be discarded after 3-6 months use.
They must NOT be used with any clarifying chemicals in the spa.