uxcell Aquarium Fish Tank Plastic Sucker Clip Divider Sheet Holder Black 10pcs You can easily divide your tank into several compartments with these divider holders. Use these divider holders for separations of different fish, for breeding and to prevent your fish to fight as well. Handy clips to divide a bigger fish tank into several compartment for breeding or separation Use with divider sheet thickness 5mm Suction Cup Diameter: 3cm/1.2" Fit Glass Thickness: 5mm/0.2"