Green Klean® Superior Quality Replacement Exhaust Filters, Fits Windsor® Sensor XP12, SR12, SR15, SR18 and XP15 (GK-5143, 5143 & 8. 614-145. 0). Designed specifically for commercial use; equal to/exceeds OEM quality. For use with Windsor® Sensor XP12, SR12, SR15, SR18 and XP15 vacuums. Green Diamond Warranty. 1 filter per pack. Made from the highest-quality materials to achieve filtration efficiencies up to 99. 9%. Green Klean Brand superior quality commercial vacuum bags are specifically designed for the Janitorial Professional vacuum cleaners and are backed by the Green Diamond Warranty