Paul O. Abbe Pebble Mill. Model: PM-3C. Total capacity: 480 gallons. Inside dimensions: 54 in diameter x 60 in. L. Alumina media charge at 50% ratio: 4430 lbs. Typical mill rpms: (wet) 21, (dry) 23. Using porcelain balls as the grinding media, the Paul O. Abbe ball mill features a proven tongue and groove high alumina brick lining with applications to include: chemicals, paints, coatings, and ceRam Industriesics industries where the reliability and uniformity of output tolerances must maintain consistency. This unit was in prior service with Crane Plumbing in their porcelain process line. Approximate weight: 9800 lbs. Overall dimensions: 9 ft. 11-1/2 in. L x 4 ft. 9 in. W x 6 ft. 10 in. H.(H4)(ACN920).