This set of non-stick, polytetrafluoroethylene coated, fibreglass mats are made for our 28 Tray unit. These non-stick mats measure 20" x 33.5" and will fit your 28-CUD dehydrator trays perfectly, whether using the mesh or pan trays. This set of non-stick mats are made from 100% PFOA-Free materials, but rather premium PTFE-Fibreglass coating. We use no PFOA, silicone or other dangerous chemicals! Certified as safe. These mats are heat resistant up to 500°F and 100% non-stick. They will keep small food from falling through the mesh and keep your stainless steel trays super clean! Made with heat-resistant advanced materials that will not burn. These mats are reusable, can be utilised on both sides, and can be used over 1000 times. Dishwasher safe and super easy to clean.