Duda Energy Sheets:25U 1 Yd X 72" Singed Polyester Felt Filter Media, 25 Micron. Polyester felt is nominally rated. The fabric is singed to prevent breaking of fibers during filtering. Polyester felt is not as easy to clean as mesh but can still be cleaned. Generally, this felt is meant to be thrown away after it is clogged. Polyester has an excellent rating with water, vegetable oils from animals and plants, petro-oils, organic solvents and micro-organisms. Polyester has a good rating with alkalis, organic acids, mineral acids and oxidizing acids. Product Features Polyester felt filter bag - multifilament (nominal rated filter) 36" Length x 72" width Food grade material, maximum working fluid temperature: 275f Strong felt, carbon steel support ring, hanging strap, singed for added strength Excellent for water, oil, biodiesel, fuels, weak acids alkali, organic solvents microorganisms Shipping: Shipping is complimentary within the lower 48 US States. We Do Not Ship to PO/APO Boxes, HI or Alaska We Do Not Ship Outside of the Continental US All items ship within 24-72 hours of Payment For large items that require Freight shipping a valid phone number is required to call and schedule your delivery Terms of Sale and Feedback: Feedback is extremely important to us and If you are satisfied with our transaction, please take a moment to leave Positive Feedback. YOUR Satisfaction is our #1 Priority! If there are any issues, PLEASE contact us BEFORE leaving a neutral or negative rating so that we may resolve any concerns. We PROMISE we can make you happy if you give us a fair chance. Returns / Concerns: All items qualify for returns within 14 - 30 days of receipt. Buyer is responsible for return shipping on any item that is not damaged Please be sure this is an item you want before making your purchase. Customer Satisfaction is our TOP priority! All items are IN STOCK at time of listing. Inventory changes constantly and it is impossible to maintain a perfectly accurate count of all items. Please do not penalize us if we have to issue you a refund! Thank You For Your Business!