Set with pre-filter pads and filter foam pads for CristalProfi e.Key Features:• Clean and healthy water: pre-filter pad and filter foam pad for the top basket of the filter CristalProfi e.• Use: insert for the top filter basket.• 1 medium-pored foam pad 20 ppi, 1 fine-pored foam pad 30 ppi.• Freshwater and saltwater neutral, no release of harmful substances.