Features: Intake filter media cover for fish for tank, preventing media from entering your filter system. Aquarium intake filter accessories, great for bio-balls, activated carbon, ceramic and ammonia remover. Good choice for your fish for tank percolator. Traps particles and debris, enhances biological filtration, prevents small and baby aquatic pets from being drawn into filter. Made of high-quality stainless steel, rust resistant, durable, and safe for fish and water. Specifications: Material: Stainless Steel, Acrylic Color: Silver Size (Approx.): S-I.D.12mm/0.47in L-I.D.16mm/0.63in Weight (Approx.): S-10g L-20g Package Includes: 1 Piece Aquarium Filter Guard (S/L) note: 1.Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!