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 ceramics 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).