General description Filter Socks are essential for maintaining a clean and healthy environment in fish tanks, saline aquariums, and ponds. Designed to effectively filter out debris and particles, these socks are a reliable choice for sump and overflow systems. Technical specifications Material: polypropylene (PP) Diameter: 105 mm Overall length: 380 mm Micron rating: 200 micrometres Measurement allowed error: +/- 1-3 cm Package Contents 16 x aquarium filter socks