The Sebo E-Series Service Box is a set of replacement parts and filters for Sebo vacuum cleaners. The Ultra-Bags have a 5.3 quart capacity and are made of multi-layer electrostatic material to capture dust, dirt, and allergens. The Hospital-Grade Microfilter captures 99.9% of particles down to 0.3 microns in size, while the Exhaust Microfilter helps to eliminate odors.