The following is the manufacturer's warranty policy as published by Daystar Filters.
GUARANTEE Used as directed, your DayStar filter is guaranteed for five or ten years as stated on warranty document included in shipment. Should the filter become inoperative due to optical or mechanical failure, we will repair the filter or replace it with an equivalent filter at no repair cost to the customer. Please note Optional Advance Replacement Policy.
Warranty
Warranty terms vary by product, consult the individual product manuals for applicable warranty.
Please note that blockers and trimmers are considered a wear item and only warranteed on a pro-rated basis.