Specifications:
Material: High-quality durable polyester
Color: White Size:
Length: 7inch/18cm
Caliber:4inch/10.4cm
Aperture:200micron

Features:
1. These highly durable mechanical filter socks are used to overflow drains and help capture uneaten food, free-floating particles, microbubbles, and even dust from aquariums, purifying water and making your tank look clear and crystal clear.
2. To a certain extent, it prevents large and small objects such as sand and corals from damaging aquarium equipment.
3. Trust that your animals kept in aquariums will love our filter stockings because it improves their quality of life and allows them to live in a higher quality environment.

Tips :
1. Please allow 0.1-0.3 inch error due to manual measurement. Thank you for your understanding.
2.When a new sock is first put into the water, the bottom will float slightly, which is normal. But you can ignore it, put it on the filter sock frame to work, wait for the filter sock to fully penetrate into the water, the water flow will naturally fill it, it will no longer float.

Packing List:
6 x aquarium felt filter sock