what is the dimensions of this item? Looking for at a black filter about 11/2"-2" thick, and can be cut in a strip about 1" wide and about 4' long

It's about 6"x6" square and 1" thick. I didn't measure, but that's within a half inch on the side measurements, and a quarter inch of the thickness1. So, no, you won't be able to get a 4' strip from it. You can buy filter material that is not cut down so small already, so that you can make custom shapes/sizes. I don't know of any that come large enough to make a 4', but perhaps a place that sells to professional aquariums would carry stuff that big.

Do these contain carbon?

This product does not contain carbon.

which kind of material is this foam? PU or Others

I am afraid I don't know the answer to your question, sorry!

Can use with aquion filter

I do not know, they would have to be the same dimensions.

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API FILSTAR XP FILTRATION FOAM 20 PPI Aquarium Canister Filter Filtration Pads 2-Count (723A)

Product ID: 4235391

🌊Compatible with freshwater & saltwater aquariums

🧽20 PPI foam density for optimal particle capture

♻️Reusable with monthly washing for eco-friendly maintenance

€ 36.56

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Sold byAmazon SlovakiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🧼 Elevate your aquarium’s clarity game—because your fish deserve the best!

ECO SMART MAINTENANCE - Wash monthly and replace every 3 months to sustain peak filtration without waste
BALANCED BIOLOGICAL SUPPORT - Never replace all pads at once to maintain your tank’s healthy ecosystem
PRECISION 20 PPI FILTRATION - Captures large waste particles to keep your aquarium crystal clear
TAILORED FIT FOR FILSTAR XP - Seamlessly integrates with API FILSTAR XP canister filters for hassle-free setup
VERSATILE AQUARIUM COMPATIBILITY - Perfect for freshwater, saltwater, and reef tanks—your aquatic world’s best ally

The API FILSTAR XP Filtration Foam 20 PPI is a high-performance filtration pad designed specifically for API FILSTAR XP canister filters. Engineered to trap large waste particles, it supports both freshwater and saltwater aquariums. Easy to maintain with monthly washing and recommended replacement every three months, it ensures a balanced aquatic environment by encouraging staggered pad replacement. Trusted by aquarists for over 50 years, this foam pad helps keep your tank pristine and your fish thriving.

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