The diameter of the lid is about 165mm/6.49" in black and 245mm/9.64" in red, suitable for most buckets. Our plastic bucket lids are made of high-strength plastic material, durable and practical. The IBC ton barrel lid has a built-in filter bag, which is made of needle felt, and most importantly, does not tear and can be reused after cleaning. The IBC rain filter lid can be emptied, rinsed and reused for installation on IBC rain tanks. This plastic bucket lid is widely used for water purification in IBC rainwater tanks.