LTWHOME Replacement Foam Filters Fit for Laguna PowerFlo Underwater Filter, PT-500, PT-505 (Pack of 6) They are just Activated Carbon

They are just Activated Carbon impregnated foam

Safely and Effectively Cleans all Hard-floor Surfaces

Custom designed and manufactured for Fluval 404 405 406 filtration systems

Pack include: 6 pcs microfiber pads

This is not a Sienna OEM product and is not covered under any Sienna manufacturer's warranty

LTWHOME Replacement Foam Filters Fit for Laguna PowerFlo Underwater Filter, PT-500, PT-505 (Pack of 6) They are just Activated CarbonPack include: 6pcs. Size: 275 x 130 x 65mm. This foam filter is custom designed and manufactured for Laguna Powerful Mechanical (PT 500) and Biological (PT 505) Underwater Filters. Captures dirt and debris as water flows through it, provides efficient water flow with less clogging.