The Haze Square Tray Top Cover includes the tray, the Air Path Filters, and the Tray Replacement Silicone Seal. It combines with the Tray and Material Pods to form a complete four bowls so you can pre-pack even more herbs. The Tray Top Cover is made of high temperature aluminum, with silicone and stainless steel parts. The Haze Square is no longer in production, but we still stock some limited accessories.