Check the listing for details. Flexible Aerogarden FARM Seed Starter Tray Sponge 85pc Covers Keep Algae Down Bk. Condition: New. Listed at 50.00 USD. This is a set of flexible sponge covers for the seed starter trays for the aerogardens. These are needed to keep light out to keep algae down. You will receive 85 covers per set ordered. This is the exact amount you need for a Farm seed tray. These fit all the seed trays, but if you need a smaller amount those are in other listings. This set is Black. Video shows black for demonstration of item. These are designed for the old and new seed starter trays for sprout, bounty, harvest and farm models. This is a 3d printed plastic design created and printed by our family. They are made to flex so plants or flowers can be safely transplanted or pulled away after they are done growing, and then the covers can be reused in your next garden. Aerogardens only used to photograph to show how items work. If you also need seed tray spacer covers those are in another listing. More aerogarden 3d parts coming soon to the shop.