Efficiency Production's Stone Mizer Series bedding material container offers a wider and more durable design than any competitor. Stone Mizers can accommodate over-sized excavator buckets while withstanding the forces of larger excavators. Stone Mizers are available in capacities ranging from 5 to 20 cu. yd. in four different series types: Standard, Heavy Duty, Extended Width Heavy Duty, and Extended Width Severe Duty. Custom built models are also available.