There are various shapes of fish tanks, please measure the width of your fish tank before buying to confirm that the product size is suitable. Transparent divider is too thick to cut manually so cutting machine is needed for any modification. Fish Tank Divider requires assembly. Please measure your tank. Please measure your tank. Please measure your tank. Fish tank separator size: 11.4 * 11.8 *0.12 (29cm*30cm*3mm), aperture : 0.2 (5mm);Suitable for aquariums with a width of 12 inches, using laser cutting, the circumference and the hole are smooth, the aperture is well-designed to secure the safety of your fish. It suitable for fish tanks with a width of 11.4 to 12.5 . Product material: Eco-friendly, non-toxic, high hardness, corrosion resistance, easy to clean; high transparent acrylic (PMMA), the light transmittance is more than 92%, does not affect the aquarium landscaping and looking. New design: The state of the art design with long holes around, can be placed horizontally and vertically, which is Conducive to fish feces through and more convenient for stitching. Additional accessories allow you to easily assemble more than two dividers to fit more fish tank sizes;The holes are denser, allowing more water to pass through. Complete accessories: Including transparent suction cups*8, fixing clip*8, transparent screw*4, screwdriver*1; easy to install, no need to purchase additional accessories, and provide more for spares. Safety packaging: Acrylic fish tank isolation board, including accessories, are covered with protective films on both sides to prevent scratches，The accessories are packaged separately, and the partition is wrapped with shock-absorbing materials for transportation protection purpose,If anything is missing or damaged in shipping please contact us. UPC 771077884519 ASIN B09XTYW6P8 Brand Name LYL LEYOULAND Item Shape Square Unit Count 1.00 Count Tank Volume 20 Gallons Manufacturer LEYOULAND Material Type Acrylic Product Style Modern Vivarium Type Aquarium Target Species Fish Additional Features Lightweight Included Components Transparent suction cups, fixing clips, transparent screws, screwdriver Item Dimensions L x W x H 11.8 L x 11.4 W x 0.12 H Specific Uses For Product Indoor