EZ-Twist (Ivory) Housing Also available in black Approx. area of coverage 2,000 cu. ft. Packed 12 housings per box. Uses #34-7600 Series refills. #34-7600 Series EZ-Twist Replacement Disks Package of 12. Available in all AromaVision fragrances. For use with EZ-Twist and Vaportronic.