Mirro Pressure Cooker Model “394 M”. Parts List for Mirro Matic “394 M” Pressure Cooker. Mirro® parts for the Mirro® model “394M” may be ordered on-line using the links below. Mirro 9888 Metal safety fuse M9888$7.99 Mirro 9898 Pressure Regulator 9898$17.95 Mirro 9894 Vent Tube 9894$9.95 Mirro 9896 Gasket Replaces M-9896 9896$10.98 6 3/4 in. dia Canning Rack 341$7.49 *Orders placed before 2:00 PM ET will ship same day. Orders placed after 2:00 PM will ship next business day!