Windsor Replacement Sensor Replacement Exhaust Filter Fits XP12, SR12 SR15, SR18 & XP15(OEM# 5143 & 8.614-145.0) 50 Filters, GK-5143 GK-5143 Green Klean® Replacement vacuum filters use the highest quality filter media. Designed specifically for commercial use, they are always equal to, or exceed OEM quality. Better filtration means cleaner air, less dusting, and longer secondary filter life. Each bag is printed to easily identify the vacuum it fits. Clean with Confidence, Replace with Green Klean.