Powerfilter protector is a mesh for easy holding of the cotton wool
You do the gauze for the cotton wool and fix it with an elastic band (2 supplied). This looks a lot nicer and the cotton wool is not annoying about the elastic.
The mesh is made of plastic and is 20 cm long and easily fits the standard 20mm or 25mm filter basket and comes with 2 elastic bands.
Do you need a larger piece, order a multiple of 20cm, we then deliver long piece of gauze