<b>Why do our filters stand out?</b><p><i>Design...</i></p><p>Due to our exacting standards, the dimensions and shape of our high quality filters allow each piece to have a snug fit in compatible lids. Also, many other filters give pesky pests a place to nest safely out-of-sight. Don't spare a second guessing whether or not your odor absorber has been infested by bugs!</p><p><i>Life-expectancy...</i></p><p>If used under the proper conditions, when indoor compost is emptied into an outdoor composting bin or tumbler in due time, expect these filters to last longer - we advise you replace them at intervals that suit you and, most importantly, your nose best!</p><p><i>Ease of install...</i></p><p>First, simply pinch and pull out the old filters. Second, our square shaped compost filter is replaced by pushing the center of the filter into the lid with a finger and then tucking each of its corners in, allowing the filter to sit flush against the inner curvature of the lid's dome. Last, our circular shaped filter fits into the notch at the bottom of the lid - it's best to insert it bit-by-bit while rotating the lid in yours hands. It takes just a matter of moments to have your compost pot smells trapped and under control!</p><p><i>Worry-free...</i></p><p>It's normal for a bit of the odor absorbing activated carbon to flake off during installation and for you to have to bend and wrinkle the filters slightly to install them - you won't hurt them and they will absorb odors just the same!</p><p>Also, if your filter replacement kit bag comes with a couple of holes punched in it (done for shipping purposes,) just place a small piece of tape across each hole to trap out outside air so that your replacement filters don't get oxygenated before you need them!</p><p>And, if your composting pail lid is a different size, no problem - trim our 6.5-inch filters for smaller 4, 5, 5.5, and 6 inch lids or use loosely-installed in 7, 7.25, and 8 inch lids. Trim for DIY projects also.</p>