The Droll Yankees ONYX Sunflower / Mixed Bird Seed Feeder with Removable Base 18 in. (CC18S) is an advanced antimicrobial technology feeder. This is excellent in fighting the growth and spreading of damaging mildew, mold and bacteria. This is originally constructed with clear interior which provides an ideal flow for seeds. For convenient cleaning, you can twist and release the base anytime you want. Keeping your feeder clean will ensure that you are giving your birds healthy and safe dining station. The Droll Yankees ONYX Sunflower/Mixed Seed Feeder with removable base includes 4 ports with comfort perches and a 180-degree, two-position rings which gives the seed an entry from a variety of angles. Its black elegant color will surely be an eye-catching feeder not just for your birds but also for bird lovers like you.