Batch rations up to 1220 cu . ft . with a Roto-Mix Horizontal or up to 1300 cu . ft . with a Roto-Mix Vertical mixer . Combine the quick , gentle mixing action of a Roto-Mix Stationary with the efficient , cost effective delivery of a RDB belt floor or FDB chain floor delivery box to maximize profitability . Roto-Mix delivery boxes allow you to either match your feeder to the capacity of your stationary mixer , or with capacities up to 1900 cu . ft ., choose to deliver multiple stationary batches in one trip !