This is an OEM product from Aqua Exclusive™ which is designed for the Green Line Bio Filter. For safety it is important to always have a lid on your filter when it is on. If you would still like to keep an eye on the operation of the filter, you can choose for a transparent lid, which gives you optimal control over your bio filter. The lid is made from high quality polypropylene and ABS.
If you have any questions about replacing a bio filter part, please contact our support team. They are 24/7 available to help you.