Large 3 1/2 quart capacity will clean the equivalent of 400 38 special cases or 180 30-06 cases at a time. Fan cooled, sealed ball bearing motor runs smoothly and quietly. Includes a convenient in-line on/off switch. Thick 3/16" bowl will stand up to a lifetime of use. Removable lid lets you inspect cases while the motor is operating. Use RCBS Formula 1 Walnut Shell Media for quick thorough cleaning or Formula 2 Corn Cob Media for a polished shine. NOT FOR USE WITH LIQUID MEDIA!