vhbw - the clever way Universal water filter for aquariums, pool skimmers, garden ponds The filter sock from vhbw filters out impurities and microorganisms for improved water quality in your aquarium, pool, garden pond, etc. The filter bag is made of high-quality nylon and is long-lasting, tear-proof and resistant to oil & chemicals. Please note: for maximum filter performance the filter, the sock should be be washed out thoroughly after 2-3 days. CONTENT OF DELIVERY: - 1x filter sock TECHNICAL DETAILS: - Ring diameter: 18 cm - Filter fineness: 100 micrometre - Length: 81 cm - Material: nylon - Colour: white - Reusable vhbw - High-quality replacement parts and accessories to prolong the service life of your electronic devices.