Feeding hole circular cover fits Juwel Rio 125 180 240 350 400 450 Aquarium fish tank.  Please note: this cover has a slightly loose fit! If you need a tight fit, don't hesitate to get in touch with me before purchase to discuss your needs! This item is 3D printed in Black colour, low profile. If you like this hole cover in WHITE colour, please let me know in note for seller or contact me. Free UK delivery