This is a Premium replacement round foam filter for the MD AirMaster Cyclonic Central Vacuum, 10.25 inch #731S.
White in color to prevent the masking of dirt build up on the filter versus the genuine black filter. If not cleaned properly, a saturated filter WILL cause premature motor burn out and will cause significant power loss.
You may gently wash and reuse this filter as long as you wash it with warm water and a small amount of mild dish soap. Be sure to rinse thoroughly and allow to air dry completely.