Optimal Size and Compatibility: Each round compost bin filter measures 6.7 inches in diameter and 5mm thick, ensuring a perfect fit for most standard-sized countertop compost bins with domed lids. These filters are ideal replacements for your kitchen's stainless steel compost bin. Advanced Odor Elimination: Equipped with 12 activated charcoal filters, our compost bin filters effectively prevent unpleasant kitchen odors from escaping your compost pail. Enjoy a fresher, cleaner kitchen atmosphere with these efficient odor-absorbing filters. Durable and Long-Lasting: Crafted from materials, each filter boasts a fine particle size of 20 microns, designed to trap and neutralize odors effectively. These robust filters maintain their odor-absorbing qualities for up to four months, offering long-term freshness. User-Friendly Installation: Installing or replacing the filters in your compost bin is a breeze and takes just minutes. Suitable for direct replacement in most stainless steel compost bins, these filters also offer the flexibility for DIY customization if needed. Regular Replacement for Freshness: To ensure continuous odor control and kitchen hygiene, it is recommended to replace the carbon filter refills every 2 to 3 months. This pack of 12 filters ensures you have ample replacements at hand, keeping your environment fresh and odor-free. Colour:Black Material:sponge Package Contents: 12 x Filter cotton Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.