Mirro Pressure Cooker Model “294 M”. Parts List for Mirro Matic “294 M” Pressure Cooker. Mirro® parts for the Mirro® model “294 M” may be ordered on-line using the links below. Mirro 9890 Gasket M9890$10.49 Mirro 9898 Pressure Regulator 9898$17.95 Mirro 9894 Vent Tube 9894$9.95 Mirro 9732 Fuse Over Pressure Plug 9732Regular price: $2.99Sale price: $2.00 6 3/4 in. dia Canning Rack 341$7.49 Mirro 9888 Metal safety fuse M9888$7.99 *Orders placed before 2:00 PM ET will ship same day. Orders placed after 2:00 PM will ship next business day! * IN STOCK ITEMS