Any concentrate that can fully melt to a liquid and leave no residue behind is suitable for use in the screened tray. The unscreened tray works with all types of concentrate that do not completely melt to a liquid. These reusable trays are constructed from stainless steel to securely and safely vaporize your desired concentrate. The tray can be cleared and reused with a standard torch lighter (not included). We recommend using this product with the Power Adapter and a whip attachment, or through your water pipe with the Water Pipe Whip adapter.