In- Aquarium Inflow Inlet Filter Stainless Steel Fish Shrimp Basket Mesh Net Filter Guard Fish Tank Intake Strainer Pre-Filter Cover 12mm/16mm Package Including: 1 x Aquarium Pre-Filter Sponge Material: Stainless Steel Color: Black, White Size S: 6.8*2.5 cm, inner diameter: 12 mm Size L: 8.5*3.0 cm, inner diameter: 16 mm TWO SIZES OPTIONAL: Size: small one 3.35 x 1.18 inch (H x W) , Inner hole diameter: 0.63 inch / 16 mm, Please measure the size before purchasing so that you can buy the right product. A SECURATY FOR YOUR FISH HABITATE: Give your fish pet a securaty habitate! these cylinder pre-filter cover suit for all shrimp tank owners and anyone else who has baby or small fish in their tank, provide them a safe environment. HIGH QUALITY MATERIAL: Aquarium intake filter made of stainless steel and plastic; strong and durable, compact and resistant to deformation. Safe to your fish,no harm to water PH quality, good for freshwater and saltwater environments. A MUST HAVE ACCESSORIES FOR FISH TANK FILTER: Premium pre-filter covers can be quickly and easily attached to the fish tank intake tube stem, preventing small, baby, or weaker inhabitants from being drawn into the filter.