Cat has introduced the CB-300 E-Series asphalt compactors. The double-drum CB-334E has a 51-inch compaction width and an operating weight of 8,731 pounds. Model CB-335E offers a combi configuration with a 51-inch-wide drum at the front and four smooth tires at the rear. Cat says the unit can take the place of two compactors by providing the benefits of a vibratory and a pneumatic compactor. Both machines feature the 50-hp, four-cylinder Tier 2 Cat 3024C diesel engine.