Alfie Pet – Rishi Aquarium Fish Tank Acrylic Divider Isolation Board (Suction Cup Included) – Size: Medium

Those holes are 5mm wide. Made of high-quality acrylic material providing a good space for the fish. Transparent design and advanced environmental protection materials to provide sufficient protection for your fish safety. We have covered the product with a white protective film please remove it before use.Sizing:Measures 6.25-7.5L x 7.25H.