Heavy Duty Poly Drum 12 Cu Ft Concrete Mixers by Multiquip with Honda Engine MC12PHConcrete Mixers MC12PH Heavy Duty Poly Drum with Honda Engine 12 Cu. Ft. 12 cf Concrete, Heavy Duty Poly Drum, Honda GX340 Multiquips largest concrete mixer is ideal for most jobs. The 12 cubic foot EASYCLEAN polyethylene drum ends time consuming cleanout hassles. A few taps with a mallet and dried concrete falls right out. The durable construction, easy maintenance, and reliable design make them the right choice for the professional contractor. 12