A cover for a disposable oil filter. A first portion of the nanoparticulates is adhered to the surface and a second portion is in contact with the first portion. A looped circulation channel for returning the chemical liquid supplied from the pump chamber to the pump chamber is connected to the pump, and provided with an expanding and contracting portion. The PC may read information from each IDE device, convert the information into a format defined by the IEEE 1394 standard, and store the information in a provided configuration read-only-memory. The web member has opposite longitudinal side ends, each of the side ends being hingedly connectable to the projecting end of either one of the anchor members.