U.S. Stoneware Model 803FV Jar Rolling Mill, 72″ long rolls, 3 Tier Design, roll spacing to accommodate jars of various sizes, each tier has weight limit of 280 lbs. per tier, adjustable roll speed via dial controller, 0 to 320 rpm, 1.5 hp motor operating at 115 volt, 1 phase, 60 hertz. This mill can handle jars from 2″ diameter to 15″ diameter or U.S. Stoneware Jars from #000 to #6. 17 1/2″ clearance between tiers. Great jar mill roller if you need to roll many jars or jars of a variety of sizes and volumes.