This style of Milk Bartm Calf Self Feeder has 10 compartments each holding a half-gallon of milk replacer which makes it easy to see that each calf is getting the proper amount. The exclusive nipple design of the Milk Bar slows down gulping which prevents choking and also promotes salivation, which is essential for proper digestion and stomach development. Watch calves feeding on MilkBar feeders!Patented E-Z lock mounting bracket will fit any rail width from wire up to 2.5 inches, will lock in place, yet is easily removed with a light touch of the catch.Durable grey poly container hooks onto wire or one-by-four wood rail and the 10 gravity-flow nipples require no valves or tubes. Capacity is 2 quarts per compartment.