Fiber Determination with an adapted pore size for CF,NDF,ADF or ADL determination. Nitrogen-free, making it suitable for determining the content of cell wall-bound proteins (e.g. NDLXP), for protein determination using Kjeldahl in the context of fibre determination and for chitin analysis in insect-based animal feeds . Residue free incineration. Large surface area for effective detergent flow without clogging.