The Red Sea ReefMat 250 Fleece-Roll is an essential component for the Red Sea ReefMat 250 automatic filter roller, designed to enhance mechanical filtration in marine aquariums. This specially crafted fleece-mat efficiently captures fine particles and detritus from the water column, contributing to clearer and healthier water conditions in the aquarium. Its high-absorbency and easy-to-replace design make it a convenient and effective choice for aquarists seeking to maintain superior water quality in their reef systems. Fleece-mat roll width 8cm. Fleece-mat roll length 32cm.